Common Weakness Enumeration

CWE-436

Allowed-with-Review

Interpretation Conflict

Abstraction: Class · Status: Incomplete

Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state.

263 vulnerabilities reference this CWE, most recent first.

GHSA-F7J2-6V4C-HJXW

Vulnerability from github – Published: 2022-05-24 17:09 – Updated: 2022-05-24 17:09
VLAI
Details

The Quick Heal AV parsing engine (November 2019) allows virus-detection bypass via a crafted GPFLAG in a ZIP archive. This affects Total Security, Home Security, Total Security Multi-Device, Internet Security, Total Security for Mac, AntiVirus Pro, AntiVirus for Server, and Total Security for Android.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2020-9362"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-436"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-02-24T16:15:00Z",
    "severity": "MODERATE"
  },
  "details": "The Quick Heal AV parsing engine (November 2019) allows virus-detection bypass via a crafted GPFLAG in a ZIP archive. This affects Total Security, Home Security, Total Security Multi-Device, Internet Security, Total Security for Mac, AntiVirus Pro, AntiVirus for Server, and Total Security for Android.",
  "id": "GHSA-f7j2-6v4c-hjxw",
  "modified": "2022-05-24T17:09:35Z",
  "published": "2022-05-24T17:09:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-9362"
    },
    {
      "type": "WEB",
      "url": "https://blog.zoller.lu/p/from-low-hanging-fruit-department_24.html"
    },
    {
      "type": "WEB",
      "url": "https://blog.zoller.lu/p/tzo-20-2020-quickheal-malformed-archive.html"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/156580/QuickHeal-Generic-Malformed-Archive-Bypass.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2020/Mar/14"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-F8F7-69V5-W4VX

Vulnerability from github – Published: 2023-07-11 21:30 – Updated: 2023-11-25 12:30
VLAI
Details

The HTTP/1 client does not fully validate the contents of the Host header. A maliciously crafted Host header can inject additional headers or entire requests. With fix, the HTTP/1 client now refuses to send requests containing an invalid Request.Host or Request.URL.Host value.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2023-29406"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-113",
      "CWE-436"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-07-11T20:15:10Z",
    "severity": "MODERATE"
  },
  "details": "The HTTP/1 client does not fully validate the contents of the Host header. A maliciously crafted Host header can inject additional headers or entire requests. With fix, the HTTP/1 client now refuses to send requests containing an invalid Request.Host or Request.URL.Host value.",
  "id": "GHSA-f8f7-69v5-w4vx",
  "modified": "2023-11-25T12:30:22Z",
  "published": "2023-07-11T21:30:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-29406"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/cl/506996"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/60374"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/2q13H6LEEx0"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2023-1878"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202311-09"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20230814-0002"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-FF7Q-6VWH-V9M4

Vulnerability from github – Published: 2024-06-28 00:33 – Updated: 2024-06-28 18:57
VLAI
Summary
Name confusion in x509 Subject Alternative Name fields
Details

In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject Alternative Name fields in TLS certificates are incorrectly allowed to have a special meaning in regular expressions (such as a + wildcard), leading to name confusion in X.509 certificate host verification.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "phpseclib/phpseclib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.22"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "phpseclib/phpseclib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "2.0.46"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "phpseclib/phpseclib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "3.0.33"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-52892"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-436"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-06-28T18:57:31Z",
    "nvd_published_at": "2024-06-27T22:15:10Z",
    "severity": "HIGH"
  },
  "details": "In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject Alternative Name fields in TLS certificates are incorrectly allowed to have a special meaning in regular expressions (such as a + wildcard), leading to name confusion in X.509 certificate host verification.",
  "id": "GHSA-ff7q-6vwh-v9m4",
  "modified": "2024-06-28T18:57:31Z",
  "published": "2024-06-28T00:33:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52892"
    },
    {
      "type": "WEB",
      "url": "https://github.com/phpseclib/phpseclib/issues/1943"
    },
    {
      "type": "WEB",
      "url": "https://github.com/phpseclib/phpseclib/commit/6cd6e8ceab9f2b55c8cd81d2192bf98cbeaf4627"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/phpseclib/phpseclib"
    },
    {
      "type": "WEB",
      "url": "https://github.com/phpseclib/phpseclib/releases/tag/3.0.33"
    },
    {
      "type": "WEB",
      "url": "https://github.com/x509-name-testing/name_testing_artifacts"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Name confusion in x509 Subject Alternative Name fields"
}

GHSA-FM3M-JRGM-5PPG

Vulnerability from github – Published: 2025-08-04 20:46 – Updated: 2025-08-06 14:12
VLAI
Summary
RatPanel can perform remote command execution without authorization
Details

Summary

  • When an attacker obtains the backend login path of RatPanel (including but not limited to weak default paths, brute-force cracking, etc.), they can execute system commands or take over hosts managed by the panel without logging in.
  • In addition to this remote code execution (RCE) vulnerability, the flawed code also leads to unauthorized access.

Details

In Go, r.URL.Path retrieves the part of the URL that comes after the port and before the query parameters or anchor symbols. For example, in the URL http://localhost:8080/api/ws/ssh?id=1, the retrieved path would be /api/ws/ssh.

However, if the request is made to http://localhost:8080//api/ws/ssh?id=1, the parsed r.URL.Path would be //api/ws/ssh.

RatPanel uses the CleanPath middleware provided by github.com/go-chi/chi package to clean URLs, The route path inside the chi router will be cleaned to /api/ws/ssh, but this middleware does not process r.URL.Path, so the path is still //api/ws/ssh.

image

In the must_login middleware, RatPanel uses r.URL.Path to match the hard-coded prefix whitelist, because /api/ws does not match //api/ws. The must_login middleware will allow the request, but //api/ws has been cleaned to /api/ws in the chi router. This inconsistency leads to authentication bypass and accessing the dangerous interfaces such as /api/ws/exec and /api/ws/ssh.

image-20250706193354738

But there are some limitations. Before exploiting this interface, the attacker must first identify the correct backend address of ratpanel to activate session legitimacy—specifically, to ensure sess.Put("verify_entrance", true). That said, accessing /api/ws only requires activating the session and does not require completing further authentication or login steps. Therefore, this is assessed to be a remotely exploitable command execution vulnerability with moderate severity.

PoC

I first carried session=......, accessed the backend login page normally(without completing the authentication process), activated the session, and then used the _wsdump.py script provided by the Python websocket-client library to complete the authentication and exploit the vulnerability.

image-20250706202209133 image-20250706202330056 image-20250706202450433

Because of the authorization code

// internal/http/middleware/must_login.go
if slices.Contains(whiteList, r.URL.Path) || !strings.HasPrefix(r.URL.Path, "/api") {
    next.ServeHTTP(w, r)
    return
}

This vulnerability affects the authorization mechanism across all APIs, for example

image-20250706204411739 image-20250706204429581

This authentication vulnerability appears to affect versions v2.3.19 to v2.5.5.


Data packet

GET //api/...... HTTP/2
Host: IP:PORT
Cookie: session=XXXXXX
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Content-Type: application/json; charset=UTF-8
Connection: close


python _wsdump.py wss://ip:port//api/ws/exec --headers "Cookie: session=xxxxxx" -n

Impact

Users running Ratpanel versions v2.3.19 to v2.5.5—especially those who have exposed their admin panel login URL or use weak login URL paths—are vulnerable to unauthorized access. Additionally, versions v2.5.1 to v2.5.5 are susceptible to server and hosted machine takeover.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/tnborg/panel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.3.19"
            },
            {
              "fixed": "2.5.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/tnborg/panel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-20241111062800-91ecd04c2700"
            },
            {
              "fixed": "0.0.0-20250707071915-4985eb2e1f38"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-53534"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-305",
      "CWE-436"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-08-04T20:46:32Z",
    "nvd_published_at": "2025-08-05T21:15:38Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\n* When an attacker obtains the backend login path of RatPanel (including but not limited to weak default paths, brute-force cracking, etc.), they can execute system commands or take over hosts managed by the panel **without logging in**.\n* In addition to this **remote code execution (RCE) vulnerability**, the flawed code also leads to **unauthorized access**.\n\n### Details\n\nIn Go, `r.URL.Path` retrieves the part of the URL that comes after the port and before the query parameters or anchor symbols. For example, in the URL `http://localhost:8080/api/ws/ssh?id=1`, the retrieved path would be `/api/ws/ssh`.\n\nHowever, if the request is made to `http://localhost:8080//api/ws/ssh?id=1`, the parsed `r.URL.Path` would be `//api/ws/ssh`. \n\nRatPanel uses the `CleanPath` middleware provided by `github.com/go-chi/chi` package to clean URLs, The route path inside the chi router will be cleaned to `/api/ws/ssh`, but this middleware does not process `r.URL.Path`, so the path is still `//api/ws/ssh`.\n\n![image](https://github.com/user-attachments/assets/788a7263-38f6-4b74-aa4a-b935239362f7)\n\nIn the `must_login` middleware, RatPanel uses `r.URL.Path` to match the hard-coded prefix whitelist, because `/api/ws` does not match `//api/ws`. The `must_login` middleware will allow the request, but `//api/ws` has been cleaned to `/api/ws` in the chi router. This inconsistency leads to authentication bypass and accessing the dangerous interfaces such as `/api/ws/exec` and `/api/ws/ssh`.\n\n![image-20250706193354738](https://github.com/user-attachments/assets/a0be46a5-9e82-4623-9b21-7247798a3c98)\n\nBut there are some limitations. Before exploiting this interface, the attacker must first identify the correct backend address of ratpanel to activate session legitimacy\u2014specifically, to ensure `sess.Put(\"verify_entrance\", true)`. That said, accessing `/api/ws` only requires activating the session and does not require completing further authentication or login steps. Therefore, this is assessed to be a remotely exploitable command execution vulnerability with moderate severity.\n\n\n### PoC\n\nI first carried `session=......`, accessed the backend login page normally` (without completing the authentication process)`, activated the session, and then used the [_wsdump.py](https://github.com/websocket-client/websocket-client/blob/master/websocket/_wsdump.py) script provided by the Python websocket-client library to complete the authentication and exploit the vulnerability.\n\n![image-20250706202209133](https://github.com/user-attachments/assets/89849095-8d90-465b-8d67-91b49e61c7bf)\n![image-20250706202330056](https://github.com/user-attachments/assets/6188f519-13f7-4ca9-84ef-f743bda55ae2)\n![image-20250706202450433](https://github.com/user-attachments/assets/76e4f8f3-ad67-4295-ab83-6ec910f7449d)\n\nBecause of the authorization code\n\n```golang\n// internal/http/middleware/must_login.go\nif slices.Contains(whiteList, r.URL.Path) || !strings.HasPrefix(r.URL.Path, \"/api\") {\n    next.ServeHTTP(w, r)\n    return\n}\n```\n\nThis vulnerability affects the authorization mechanism across all APIs, for example\n\n![image-20250706204411739](https://github.com/user-attachments/assets/5da63d83-2652-4275-8a80-c7878de62f5c)\n![image-20250706204429581](https://github.com/user-attachments/assets/d83a323a-a98e-4ec0-9480-06e0d8670513)\n\nThis authentication vulnerability appears to affect versions **v2.3.19 to v2.5.5**.\n\n---\n\nData packet\n\n```text\nGET //api/...... HTTP/2\nHost: IP:PORT\nCookie: session=XXXXXX\nAccept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2\nAccept-Encoding: gzip, deflate\nContent-Type: application/json; charset=UTF-8\nConnection: close\n\n\n```\n\n```cmd\npython _wsdump.py wss://ip:port//api/ws/exec --headers \"Cookie: session=xxxxxx\" -n\n```\n\n### Impact\n\nUsers running Ratpanel versions v2.3.19 to v2.5.5\u2014especially those who have exposed their admin panel login URL or use weak login URL paths\u2014are vulnerable to unauthorized access. Additionally, versions v2.5.1 to v2.5.5 are susceptible to server and hosted machine takeover.",
  "id": "GHSA-fm3m-jrgm-5ppg",
  "modified": "2025-08-06T14:12:21Z",
  "published": "2025-08-04T20:46:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tnborg/panel/security/advisories/GHSA-fm3m-jrgm-5ppg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-53534"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tnborg/panel/commit/4985eb2e1f388ecd6faf331941c13cb97368ec1d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tnborg/panel/commit/91ecd04c270061429f9df5ec19cd6b96a9f595f2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tnborg/panel/commit/ed5c74c7534230ba685273504af4c1e1e3598ff1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tnborg/panel"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tnborg/panel/releases/tag/v2.5.6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "RatPanel can perform remote command execution without authorization"
}

GHSA-FQC7-9XJW-JRH3

Vulnerability from github – Published: 2026-06-09 21:58 – Updated: 2026-06-09 21:58
VLAI
Summary
SymfonyRuntime CVE-2024-50340 Patch Bypass: Web Requests Can Still Set APP_ENV/APP_DEBUG via parse_str/SAPI Argv Mismatch
Details

Description

CVE-2024-50340 (GHSA-x8vp-gf4q-mw5j) addressed an issue where, with register_argc_argv=On, a crafted query string let an unauthenticated GET change the kernel environment and debug flag by feeding --env/--no-debug through $_SERVER['argv']. The fix shipped in symfony/runtime 5.4.46 / 6.4.14 / 7.1.7 gated the argv read on empty($_GET) as a proxy for "is this a CLI invocation".

That proxy is unsafe: parse_str() (which builds $_GET) and the web SAPI (which builds $_SERVER['argv'] from the raw query when register_argc_argv=On) do not agree on every input, so an attacker can craft a query that leaves $_GET empty while $_SERVER['argv'] carries the attacker's flags. SymfonyRuntime::getInput() then parses them, restoring the exact primitive CVE-2024-50340 was meant to prevent.

Preconditions and impact match the original CVE: web SAPI, register_argc_argv=On, app booted through symfony/runtime; from an unauthenticated GET an attacker can flip APP_ENV and toggle APP_DEBUG.

Resolution

SymfonyRuntime now gates the argv read on isset($_SERVER['QUERY_STRING']) rather than on empty($_GET). QUERY_STRING is the same input the SAPI uses to build argv, so the security check and the thing it protects no longer parse different sources. Worker SAPIs (FrankenPHP / RoadRunner / Swoole) keep working because the runtime constructor runs once at boot when QUERY_STRING is unset.

The patch for this issue is available here for branch 5.4.

Credits

SymfonyRuntime would like to thank 0xEr3n for reporting the issue and Nicolas Grekas for providing the fix.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/runtime"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.4.46"
            },
            {
              "fixed": "5.4.52"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/runtime"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.4.14"
            },
            {
              "fixed": "6.4.40"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/runtime"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.1.7"
            },
            {
              "fixed": "7.4.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/runtime"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.0.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/symfony"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.4.46"
            },
            {
              "fixed": "5.4.52"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/symfony"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.4.14"
            },
            {
              "fixed": "6.4.40"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/symfony"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.1.7"
            },
            {
              "fixed": "7.4.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/symfony"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.0.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-47767"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-436",
      "CWE-74"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-09T21:58:11Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Description\n\nCVE-2024-50340 (GHSA-x8vp-gf4q-mw5j) addressed an issue where, with `register_argc_argv=On`, a crafted query string let an unauthenticated GET change the kernel environment and debug flag by feeding `--env`/`--no-debug` through `$_SERVER[\u0027argv\u0027]`. The fix shipped in `symfony/runtime` 5.4.46 / 6.4.14 / 7.1.7 gated the argv read on `empty($_GET)` as a proxy for \"is this a CLI invocation\".\n\nThat proxy is unsafe: `parse_str()` (which builds `$_GET`) and the web SAPI (which builds `$_SERVER[\u0027argv\u0027]` from the raw query when `register_argc_argv=On`) do not agree on every input, so an attacker can craft a query that leaves `$_GET` empty while `$_SERVER[\u0027argv\u0027]` carries the attacker\u0027s flags. `SymfonyRuntime::getInput()` then parses them, restoring the exact primitive CVE-2024-50340 was meant to prevent.\n\nPreconditions and impact match the original CVE: web SAPI, `register_argc_argv=On`, app booted through `symfony/runtime`; from an unauthenticated GET an attacker can flip `APP_ENV` and toggle `APP_DEBUG`.\n\n### Resolution\n\n`SymfonyRuntime` now gates the argv read on `isset($_SERVER[\u0027QUERY_STRING\u0027])` rather than on `empty($_GET)`. `QUERY_STRING` is the same input the SAPI uses to build argv, so the security check and the thing it protects no longer parse different sources. Worker SAPIs (FrankenPHP / RoadRunner / Swoole) keep working because the runtime constructor runs once at boot when `QUERY_STRING` is unset.\n\nThe patch for this issue is available [here](https://github.com/symfony/symfony/commit/3228c3806ee511008bea19a95084d460b17e5d25) for branch 5.4.\n\n### Credits\n\nSymfonyRuntime would like to thank 0xEr3n for reporting the issue and Nicolas Grekas for providing the fix.",
  "id": "GHSA-fqc7-9xjw-jrh3",
  "modified": "2026-06-09T21:58:11Z",
  "published": "2026-06-09T21:58:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/security/advisories/GHSA-fqc7-9xjw-jrh3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/symfony/symfony"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "SymfonyRuntime CVE-2024-50340 Patch Bypass: Web Requests Can Still Set APP_ENV/APP_DEBUG via parse_str/SAPI Argv Mismatch"
}

GHSA-G34J-R48H-5PMJ

Vulnerability from github – Published: 2024-05-03 03:30 – Updated: 2024-05-03 03:30
VLAI
Details

Softing Secure Integration Server Interpretation Conflict Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Softing Secure Integration Server. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the web server. The issue results from an inconsistency in URI parsing between NGINX and application code. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-20551.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2023-39481"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-436"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-03T03:15:14Z",
    "severity": "MODERATE"
  },
  "details": "Softing Secure Integration Server Interpretation Conflict Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Softing Secure Integration Server. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.\n\nThe specific flaw exists within the web server. The issue results from an inconsistency in URI parsing between NGINX and application code. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-20551.",
  "id": "GHSA-g34j-r48h-5pmj",
  "modified": "2024-05-03T03:30:56Z",
  "published": "2024-05-03T03:30:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-39481"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1063"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-G4W6-VMGF-XQVX

Vulnerability from github – Published: 2026-06-30 18:09 – Updated: 2026-06-30 18:09
VLAI
Summary
@cedar-policy/authorization-for-expressjs has an authorization bypass via query string manipulation
Details

Summary

@cedar-policy/authorization-for-expressjs is an open-source Express.js middleware that integrates Cedar authorization into Express applications by mapping HTTP requests to Cedar actions and evaluating authorization policies before allowing requests to proceed. An issue exists where, under certain circumstances, the middleware matches incoming requests against Cedar action mappings using req.originalUrl, which includes the query string, while Express routes requests using only the path component.

Impact

The middleware uses req.originalUrl to match incoming requests against Cedar action mappings. In Express, req.originalUrl includes the query string, while route matching uses only the path. This creates a divergence between what Cedar authorizes and what Express executes.

When an application defines separate actions for overlapping path prefixes with different authorization requirements (for example, GET /users for listing all users with admin-only access, and GET /users/{id} for retrieving a single user with any authenticated user access), an actor can append a query string to bypass the more restrictive policy. Sending GET /users/?x=1 causes the middleware to match against /users/{id} (with id parameter set to ?x=1) and evaluate the less restrictive action, while Express routes the request to the /users list handler. This allows inappropriate access to the more restrictive endpoint.

Impacted versions

<= 0.2.0

Patches

This issue has been addressed in @cedar-policy/authorization-for-expressjs version 0.3. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.

Workarounds

Validate and sanitize incoming request paths before they reach the authorization middleware. Ensure that applications do not rely solely on the middleware for authorization when defining multiple actions on overlapping path prefixes with different permission levels.

References

If you have any questions or comments about this advisory, AWS asks that you contact AWS Security via the vulnerability reporting page or directly via email to aws-security@amazon.com. Please do not create a public GitHub issue.

Show details on source website

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.2.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@cedar-policy/authorization-for-expressjs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-49473"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-436",
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-30T18:09:13Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\n@cedar-policy/authorization-for-expressjs is an open-source Express.js middleware that integrates Cedar authorization into Express applications by mapping HTTP requests to Cedar actions and evaluating authorization policies before allowing requests to proceed. An issue exists where, under certain circumstances, the middleware matches incoming requests against Cedar action mappings using req.originalUrl, which includes the query string, while Express routes requests using only the path component.\n\n### Impact\nThe middleware uses req.originalUrl to match incoming requests against Cedar action mappings. In Express, req.originalUrl includes the query string, while route matching uses only the path. This creates a divergence between what Cedar authorizes and what Express executes.\n\nWhen an application defines separate actions for overlapping path prefixes with different authorization requirements (for example, GET /users for listing all users with admin-only access, and GET /users/{id} for retrieving a single user with any authenticated user access), an actor can append a query string to bypass the more restrictive policy. Sending GET /users/?x=1 causes the middleware to match against /users/{id} (with id parameter set to ?x=1) and evaluate the less restrictive action, while Express routes the request to the /users list handler. This allows inappropriate access to the more restrictive endpoint.\n\n### Impacted versions\n\u003c= 0.2.0\n\n### Patches\nThis issue has been addressed in @cedar-policy/authorization-for-expressjs version 0.3. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.\n\n### Workarounds\nValidate and sanitize incoming request paths before they reach the authorization middleware. Ensure that applications do not rely solely on the middleware for authorization when defining multiple actions on overlapping path prefixes with different permission levels.\n\n### References\nIf you have any questions or comments about this advisory, AWS asks that you contact AWS Security via the vulnerability reporting page or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.",
  "id": "GHSA-g4w6-vmgf-xqvx",
  "modified": "2026-06-30T18:09:13Z",
  "published": "2026-06-30T18:09:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/cedar-policy/authorization-for-expressjs/security/advisories/GHSA-g4w6-vmgf-xqvx"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/cedar-policy/authorization-for-expressjs"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cedar-policy/authorization-for-expressjs/releases/tag/v0.3.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@cedar-policy/authorization-for-expressjs has an authorization bypass via query string manipulation"
}

GHSA-G57G-F23G-4646

Vulnerability from github – Published: 2026-09-29 23:44 – Updated: 2026-09-29 23:44
VLAI
Summary
Nodemailer: Quoted local-part can produce malformed envelope recipient through RFC 5322 comment parsing
Details

Summary

Nodemailer's address parser can produce an unexpected recipient address when an RFC 5322 comment follows the domain of an address whose local-part is a quoted string.

For example:

"user"@example.com(x)evil.com

is parsed as:

{
  address: "user@example.com evil.com",
  name: ""
}

The resulting address therefore contains additional attacker-controlled domain text separated by a literal space.

The parsed .address value is subsequently propagated into the SMTP envelope:

src/addressparser/index.ts
        ↓
recipient.address
        ↓
src/mime-node/index.ts
        ↓
envelope.to

The envelope construction uses the parsed address without another strict address validation step.

This appears to be a variant of the RFC 5322 comment parsing issue addressed by GHSA-cc9r-2j5m-2m83, but it follows a different parser path when the local-part is quoted.

Reproduction

Input:

"user"@example.com(x)evil.com

Observed parser output:

address: "user@example.com evil.com"
name: ""

A second example:

"a"@b.com(c)d.com(e)f.com

produces:

address: "a@b.com d.com f.com"
name: ""

For comparison, the corresponding unquoted form:

user@example.com(x)evil.com

takes a different code path and is handled by the existing protection differently.

Technical Details

The issue is caused by different parsing behavior for quoted and unquoted local-parts.

The quoted-local-part variant allows the comment-separated trailing domain atoms to remain in the resulting .address value.

That value is then used when constructing the message envelope:

envelope.to = recipients.map(to => to.address as string)

No additional strict recipient validation is performed at this boundary.

Security Impact

The confirmed impact is that attacker-controlled comment content can result in a malformed/ambiguous recipient address being accepted by the parser and propagated into envelope.to.

The reporter did not confirm successful delivery to an unintended recipient through a real SMTP server using this exact quoted-local-part variant.

The remaining question is how real SMTP servers and other Nodemailer transports handle an envelope recipient containing a value such as:

user@example.com evil.com

An end-to-end SMTP test is required to determine whether this parser behavior results in an exploitable delivery or recipient-validation bypass.

Relationship to GHSA-cc9r-2j5m-2m83

This report is intended as a potential variant/follow-up to GHSA-cc9r-2j5m-2m83.

The existing advisory addresses RFC 5322 comment handling in email domains. This report identifies a separate parser path involving quoted local-parts that can preserve additional domain-like content in the normalized address.

Please evaluate whether this behavior is already covered by the existing fix or represents a remaining parser variant.

Suggested Fix

The parser should consistently reject or correctly terminate addresses containing trailing domain atoms after RFC 5322 comments, regardless of whether the local-part is quoted.

In particular:

"user"@example.com(x)evil.com

should not result in:

user@example.com evil.com

The envelope-generation layer should also avoid assuming that a parser-produced address is safe for SMTP delivery without appropriate validation.

Verification Status

Confirmed:

  • Parser accepts the quoted-local-part variant.
  • Parser produces an address containing additional attacker-controlled text.
  • The resulting address is propagated into envelope.to.

Not confirmed by reporter:

  • Successful delivery through a real SMTP server.
  • Delivery to an unintended recipient.
  • Exploitability against a specific downstream SMTP implementation.
Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "nodemailer"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "9.1.0"
            },
            {
              "fixed": "10.0.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-436"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-29T23:44:04Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nNodemailer\u0027s address parser can produce an unexpected recipient address when an RFC 5322 comment follows the domain of an address whose local-part is a quoted string.\n\nFor example:\n\n```text\n\"user\"@example.com(x)evil.com\n```\n\nis parsed as:\n\n```text\n{\n  address: \"user@example.com evil.com\",\n  name: \"\"\n}\n```\n\nThe resulting address therefore contains additional attacker-controlled domain text separated by a literal space.\n\nThe parsed `.address` value is subsequently propagated into the SMTP envelope:\n\n```text\nsrc/addressparser/index.ts\n        \u2193\nrecipient.address\n        \u2193\nsrc/mime-node/index.ts\n        \u2193\nenvelope.to\n```\n\nThe envelope construction uses the parsed address without another strict address validation step.\n\nThis appears to be a variant of the RFC 5322 comment parsing issue addressed by GHSA-cc9r-2j5m-2m83, but it follows a different parser path when the local-part is quoted.\n\n## Reproduction\n\nInput:\n\n```text\n\"user\"@example.com(x)evil.com\n```\n\nObserved parser output:\n\n```text\naddress: \"user@example.com evil.com\"\nname: \"\"\n```\n\nA second example:\n\n```text\n\"a\"@b.com(c)d.com(e)f.com\n```\n\nproduces:\n\n```text\naddress: \"a@b.com d.com f.com\"\nname: \"\"\n```\n\nFor comparison, the corresponding unquoted form:\n\n```text\nuser@example.com(x)evil.com\n```\n\ntakes a different code path and is handled by the existing protection differently.\n\n## Technical Details\n\nThe issue is caused by different parsing behavior for quoted and unquoted local-parts.\n\nThe quoted-local-part variant allows the comment-separated trailing domain atoms to remain in the resulting `.address` value.\n\nThat value is then used when constructing the message envelope:\n\n```text\nenvelope.to = recipients.map(to =\u003e to.address as string)\n```\n\nNo additional strict recipient validation is performed at this boundary.\n\n## Security Impact\n\nThe confirmed impact is that attacker-controlled comment content can result in a malformed/ambiguous recipient address being accepted by the parser and propagated into `envelope.to`.\n\nThe reporter did **not confirm successful delivery to an unintended recipient through a real SMTP server using this exact quoted-local-part variant**.\n\nThe remaining question is how real SMTP servers and other Nodemailer transports handle an envelope recipient containing a value such as:\n\n```text\nuser@example.com evil.com\n```\n\nAn end-to-end SMTP test is required to determine whether this parser behavior results in an exploitable delivery or recipient-validation bypass.\n\n## Relationship to GHSA-cc9r-2j5m-2m83\n\nThis report is intended as a potential variant/follow-up to GHSA-cc9r-2j5m-2m83.\n\nThe existing advisory addresses RFC 5322 comment handling in email domains. This report identifies a separate parser path involving quoted local-parts that can preserve additional domain-like content in the normalized address.\n\nPlease evaluate whether this behavior is already covered by the existing fix or represents a remaining parser variant.\n\n## Suggested Fix\n\nThe parser should consistently reject or correctly terminate addresses containing trailing domain atoms after RFC 5322 comments, regardless of whether the local-part is quoted.\n\nIn particular:\n\n```text\n\"user\"@example.com(x)evil.com\n```\n\nshould not result in:\n\n```text\nuser@example.com evil.com\n```\n\nThe envelope-generation layer should also avoid assuming that a parser-produced address is safe for SMTP delivery without appropriate validation.\n\n## Verification Status\n\nConfirmed:\n\n* Parser accepts the quoted-local-part variant.\n* Parser produces an address containing additional attacker-controlled text.\n* The resulting address is propagated into `envelope.to`.\n\nNot confirmed by reporter:\n\n* Successful delivery through a real SMTP server.\n* Delivery to an unintended recipient.\n* Exploitability against a specific downstream SMTP implementation.",
  "id": "GHSA-g57g-f23g-4646",
  "modified": "2026-09-29T23:44:04Z",
  "published": "2026-09-29T23:44:04Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nodemailer/nodemailer/security/advisories/GHSA-g57g-f23g-4646"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nodemailer/nodemailer/commit/2f36eb1aa1dd33e312411dc9b888548e14db54ee"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nodemailer/nodemailer"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nodemailer/nodemailer/releases/tag/v10.0.9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Nodemailer: Quoted local-part can produce malformed envelope recipient through RFC 5322 comment parsing"
}

GHSA-GCR4-WCQH-3624

Vulnerability from github – Published: 2022-05-24 16:59 – Updated: 2022-05-24 16:59
VLAI
Details

Go before 1.12.11 and 1.3.x before 1.13.2 can panic upon an attempt to process network traffic containing an invalid DSA public key. There are several attack scenarios, such as traffic from a client to a server that verifies client certificates.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2019-17596"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-436"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-10-24T22:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Go before 1.12.11 and 1.3.x before 1.13.2 can panic upon an attempt to process network traffic containing an invalid DSA public key. There are several attack scenarios, such as traffic from a client to a server that verifies client certificates.",
  "id": "GHSA-gcr4-wcqh-3624",
  "modified": "2022-05-24T16:59:54Z",
  "published": "2022-05-24T16:59:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-17596"
    },
    {
      "type": "WEB",
      "url": "https://github.com/golang/go/issues/34960"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2020:0101"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2020:0329"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/d/msg/golang-announce/lVEm7llp0w0/VbafyRkgCgAJ"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00014.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00015.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5VS3HPSE25ZSGS4RSOTADC67YNOHIGVV"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WVOWGM7IQGRO7DS2MCUMYZRQ4TYOZNAS"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20191122-0005"
    },
    {
      "type": "WEB",
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/10134-security-advisory-46"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2019/dsa-4551"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00043.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00044.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-GM3X-23WP-HC2C

Vulnerability from github – Published: 2025-12-08 16:42 – Updated: 2025-12-17 00:44
VLAI
Summary
Path Normalization Bypass in Traefik Router + Middleware Rules
Details

Impact

There is a potential vulnerability in Traefik managing the requests using a PathPrefix, Path or PathRegex matcher.

When Traefik is configured to route the requests to a backend using a matcher based on the path; if the request path contains an encoded restricted character from the following set ('/', '\', 'Null', ';', '?', '#'), it’s possible to target a backend, exposed using another router, by-passing the middlewares chain.

Example

apiVersion: traefik.io/v1alpha1
kind: IngressRoute
metadata:
  name: my-service
spec:
  routes:
    - match: PathPrefix(‘/admin/’)
      kind: Rule
      services:
        - name: service-a
          port: 8080
      middlewares:
        - name: my-security-middleware
    - match: PathPrefix(‘/’)
      kind: Rule
      services:
        - name: service-a
          port: 8080

In such a case, the request http://mydomain.example.com/admin%2F will reach the backend service-a without operating the middleware my-security-middleware and passing the security put in place for the /admin/ path.

Patches

  • https://github.com/traefik/traefik/releases/tag/v2.11.32
  • https://github.com/traefik/traefik/releases/tag/v3.6.4

For more information

If you have any questions or comments about this advisory, please open an issue.

Original Description### Summary A vulnerability exists in Traefik’s path matching logic that allows attackers to bypass access-control middleware (e.g., blocking rules) by using URL-encoded paths. I found this vulnerability while playing PwnSec CTF 2025 with my team @0xL4ugh ### Details Traefik evaluates router rules before decoding or normalizing the request path, but forwards the request after decoding to the backend service. As a result, routes meant to block access to sensitive endpoints (such as internal, beta, or admin endpoints) can be trivially bypassed. ### PoC Traefik configuration used in this issue : ```[http.routers.flask-router-report-deny] entryPoints = ["web"] rule = "PathPrefix(`/report_note`)" priority = 10 middlewares = ["block-access"] service = "flask-service" [http.middlewares.block-access.replacePathRegex] regex = ".*" replacement = "/blocked"
The intention is to block all access to /report_note.

However, the following request bypasses the block:
POST /%2freport_note HTTP/1.1 Host: localhost:62814 ``` ### Impact Access Control Bypass: Any endpoint intended to be blocked (e.g., admin/debug/beta APIs) can be accessed by URL-encoding slashes or other characters. This could lead to: - Unauthorized access to restricted endpoints - Execution of protected internal functionality - Potential privilege escalation - Bypass of security policies enforced via Traefik routing rules
Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/traefik/traefik"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.7.34"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/traefik/traefik/v2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.11.32"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/traefik/traefik/v3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-66490"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-436"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-08T16:42:30Z",
    "nvd_published_at": "2025-12-09T01:16:55Z",
    "severity": "MODERATE"
  },
  "details": "## Impact\n\nThere is a potential vulnerability in Traefik managing the requests using a `PathPrefix`, `Path` or `PathRegex` matcher.\n\nWhen Traefik is configured to route the requests to a backend using a matcher based on the path; if the request path contains an encoded restricted character from the following set **(\u0027/\u0027, \u0027\\\u0027, \u0027Null\u0027, \u0027;\u0027, \u0027?\u0027, \u0027#\u0027)**, it\u2019s possible to target a backend, exposed using another router, by-passing the middlewares chain.\n\n## Example\n\n```yaml\napiVersion: traefik.io/v1alpha1\nkind: IngressRoute\nmetadata:\n  name: my-service\nspec:\n  routes:\n    - match: PathPrefix(\u2018/admin/\u2019)\n      kind: Rule\n      services:\n        - name: service-a\n          port: 8080\n      middlewares:\n        - name: my-security-middleware\n    - match: PathPrefix(\u2018/\u2019)\n      kind: Rule\n      services:\n        - name: service-a\n          port: 8080\n```\n\nIn such a case, the request `http://mydomain.example.com/admin%2F` will reach the backend `service-a` without operating the middleware `my-security-middleware` and passing the security put in place for the `/admin/` path.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.32\n- https://github.com/traefik/traefik/releases/tag/v3.6.4\n\n## For more information\n\nIf you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).\n\n\u003cdetails\u003e\n\u003csummary\u003eOriginal Description\u003c/summary\u003e### Summary\nA vulnerability exists in Traefik\u2019s path matching logic that allows attackers to bypass access-control middleware (e.g., blocking rules) by using URL-encoded paths. I found this vulnerability while playing PwnSec CTF 2025 with my team @0xL4ugh\n\n### Details\nTraefik evaluates router rules before decoding or normalizing the request path, but forwards the request after decoding to the backend service. As a result, routes meant to block access to sensitive endpoints (such as internal, beta, or admin endpoints) can be trivially bypassed.\n\n### PoC\nTraefik configuration used in this issue :\n```[http.routers.flask-router-report-deny]\n  entryPoints = [\"web\"]\n  rule = \"PathPrefix(`/report_note`)\"\n  priority = 10\n  middlewares = [\"block-access\"]\n  service = \"flask-service\"\n\n[http.middlewares.block-access.replacePathRegex]\n  regex = \".*\"\n  replacement = \"/blocked\"\n```\nThe intention is to block all access to /report_note.\n\nHowever, the following request bypasses the block:\n```\nPOST /%2freport_note HTTP/1.1\nHost: localhost:62814\n\n\n```\n### Impact\nAccess Control Bypass:\nAny endpoint intended to be blocked (e.g., admin/debug/beta APIs) can be accessed by URL-encoding slashes or other characters.\n\nThis could lead to:\n\n- Unauthorized access to restricted endpoints\n- Execution of protected internal functionality\n- Potential privilege escalation\n- Bypass of security policies enforced via Traefik routing rules\n\u003c/details\u003e",
  "id": "GHSA-gm3x-23wp-hc2c",
  "modified": "2025-12-17T00:44:50Z",
  "published": "2025-12-08T16:42:30Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/traefik/traefik/security/advisories/GHSA-gm3x-23wp-hc2c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-66490"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/traefik/traefik"
    },
    {
      "type": "WEB",
      "url": "https://github.com/traefik/traefik/releases/tag/v2.11.32"
    },
    {
      "type": "WEB",
      "url": "https://github.com/traefik/traefik/releases/tag/v3.6.4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Path Normalization Bypass in Traefik Router + Middleware Rules"
}

No mitigation information available for this CWE.

CAPEC-105: HTTP Request Splitting

An adversary abuses the flexibility and discrepancies in the parsing and interpretation of HTTP Request messages by different intermediary HTTP agents (e.g., load balancer, reverse proxy, web caching proxies, application firewalls, etc.) to split a single HTTP request into multiple unauthorized and malicious HTTP requests to a back-end HTTP agent (e.g., web server).

See CanPrecede relationships for possible consequences.

CAPEC-273: HTTP Response Smuggling

An adversary manipulates and injects malicious content in the form of secret unauthorized HTTP responses, into a single HTTP response from a vulnerable or compromised back-end HTTP agent (e.g., server).

See CanPrecede relationships for possible consequences.

CAPEC-34: HTTP Response Splitting

An adversary manipulates and injects malicious content, in the form of secret unauthorized HTTP responses, into a single HTTP response from a vulnerable or compromised back-end HTTP agent (e.g., web server) or into an already spoofed HTTP response from an adversary controlled domain/site.

See CanPrecede relationships for possible consequences.