CWE-636

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.4.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42423"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-636"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-09T17:32:49Z",
    "nvd_published_at": "2026-04-28T19:37:46Z",
    "severity": "MODERATE"
  },
  "details": "## Impact\n\nstrictInlineEval explicit-approval boundary bypassed by approval-timeout fallback on gateway and node exec hosts.\n\nThe approval-timeout fallback could allow inline eval commands that strictInlineEval was meant to require explicit approval for.\n\nOpenClaw is a user-controlled local assistant. This advisory is scoped to the OpenClaw trust model and does not assume a multi-tenant service boundary.\n\n## Affected Packages / Versions\n\n- Package: `openclaw` (npm)\n- Affected versions: `\u003c=2026.4.2`\n- Patched versions: `2026.4.8`\n\n## Fix\n\nThe issue was fixed on `main` and is available in the patched npm version listed above. The verified fixed tree is commit `d7c3210cd6f5fdfdc1beff4c9541673e814354d5`.\n\n## Verification\n\nThe fix was re-checked against `main` before publication, including targeted regression tests for the affected security boundary.\n\n## Credits\n\nThanks @zsxsoft and @KeenSecurityLab for reporting.",
  "id": "GHSA-q2gc-xjqw-qp89",
  "modified": "2026-05-06T02:40:53Z",
  "published": "2026-04-09T17:32:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-q2gc-xjqw-qp89"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42423"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/d7c3210cd6f5fdfdc1beff4c9541673e814354d5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openclaw-strictinlineeval-approval-boundary-bypass-via-approval-timeout-fallback"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenClaw: strictInlineEval explicit-approval boundary bypassed by approval-timeout fallback on gateway and node exec hosts"
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.1.3"
      },
      "package": {
        "ecosystem": "Go",
        "name": "helm.sh/helm/v4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "4.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-35205"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-636"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-10T15:33:03Z",
    "nvd_published_at": "2026-04-09T16:16:27Z",
    "severity": "HIGH"
  },
  "details": "Helm is a package manager for Charts for Kubernetes. In Helm versions \u003e=4.0.0 and \u003c=4.1.3, Helm will install plugins missing provenance (`.prov` file) when signature verification is required.\n\n### Impact\n\nThe bug allows plugin authors to omit provenance (signing) data from plugins, bypassing plugin signature verification upon plugin install/update.\n\nNotably, plugin hooks will be executed as designed on the installed plugin, enabling a malicious plugin to execute arbitrary code.\n\n### Patches\n\nThis issue has been patched in Helm v4.1.4\n\nInstalling/updating a plugin with missing provenance will error if signature verification is required.\n\n### Workarounds\n\nUsers may manually validate that a plugin archive is not missing provenance data (`.prov` file) before installation.",
  "id": "GHSA-q5jf-9vfq-h4h7",
  "modified": "2026-04-24T20:42:00Z",
  "published": "2026-04-10T15:33:03Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/helm/helm/security/advisories/GHSA-q5jf-9vfq-h4h7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35205"
    },
    {
      "type": "WEB",
      "url": "https://github.com/helm/helm/commit/05fa37973dc9e42b76e1d2883494c87174b6074f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/helm/helm"
    },
    {
      "type": "WEB",
      "url": "https://github.com/helm/helm/releases/tag/v4.1.4"
    },
    {
      "type": "WEB",
      "url": "https://helm.sh/docs/topics/provenance/#the-provenance-file"
    }
  ],
  "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"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Helm\u0027s plugin verification fails open when .prov is missing, allowing unsigned plugin install"
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.3.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32970"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-636"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-13T15:48:21Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "## Summary\nIn affected versions of `openclaw`, local gateway helper credential resolution treated configured but unavailable `gateway.auth.token` and `gateway.auth.password` SecretRefs as if they were unset and could fall back to `gateway.remote.*` credentials in local mode.\n\n## Impact\nThis could cause local CLI and helper paths to select the wrong credential source instead of failing closed for configured local auth SecretRefs. We did not confirm a server-side gateway-authentication boundary bypass for this issue.\n\n## Affected Packages and Versions\n- Package: `openclaw` (npm)\n- Affected versions: `\u003c= 2026.3.8`\n- Fixed in: `2026.3.11`\n\n## Technical Details\nThe local-mode fallback logic decided whether remote credential fallback was allowed based on resolved credential values rather than on whether the local auth input was actually configured. A configured-but-unavailable local SecretRef therefore looked \"absent\" to the helper layer.\n\n## Fix\nOpenClaw now tracks whether the local auth input is configured separately from whether it resolves successfully. In local mode, remote fallback is allowed only when the matching local auth input is truly unset. The fix shipped in `openclaw@2026.3.11`.\n\n## Workarounds\nUpgrade to `2026.3.11` or later.",
  "id": "GHSA-qvr7-g57c-mrc7",
  "modified": "2026-04-07T18:10:22Z",
  "published": "2026-03-13T15:48:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-qvr7-g57c-mrc7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32970"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/releases/tag/v2026.3.11"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openclaw-credential-fallback-logic-bypass-via-unavailable-local-auth-secretrefs"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenClaw: Unavailable local auth SecretRefs could fall through to remote credentials in local mode"
}

{
  "affected": [],
  "aliases": [
    "CVE-2026-103510"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-636"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-05T09:17:06Z",
    "severity": "CRITICAL"
  },
  "details": "P4 Search prior to 2026.4.2 does not fail securely when its service authentication token is blank. In affected configurations, an unauthenticated attacker with network access can obtain the highest application privilege, potentially leading to compromise of P4 Search and the connected P4 Server.",
  "id": "GHSA-rgmx-jfh8-6fx8",
  "modified": "2026-10-05T09:31:52Z",
  "published": "2026-10-05T09:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-103510"
    },
    {
      "type": "WEB",
      "url": "https://portal.perforce.com/s/cve/a91Qi000003FDw5IAG/authentication-bypass-via-blank-auth-token-in-p4search"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

{
  "affected": [],
  "aliases": [
    "CVE-2025-41759"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-636"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-09T09:15:59Z",
    "severity": "MODERATE"
  },
  "details": "An administrator may attempt to block all networks by specifying \"\\*\" or \"all\" as the network identifier. However, these values are not supported and do not trigger any validation error. Instead, they are silently interpreted as network 0 which results in no networks being blocked at all.",
  "id": "GHSA-rmhq-3pj8-86qj",
  "modified": "2026-03-09T09:30:30Z",
  "published": "2026-03-09T09:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-41759"
    },
    {
      "type": "WEB",
      "url": "https://www.mbs-solutions.de/mbs-2025-0001"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

{
  "affected": [],
  "aliases": [
    "CVE-2026-100860"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-636"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-27T02:17:25Z",
    "severity": "MODERATE"
  },
  "details": "heym before 0.0.105 does not act on the result of the credential authorization lookup in the Redis workflow node (backend/app/services/node_execution/nodes/redis_node.py). When _get_accessible_credential returns None \u2014 because the credential ID does not exist or the caller is not authorized to use it \u2014 the node treats the lookup failure as an empty configuration and falls back to defaults, connecting to localhost:6379 with no password and executing the requested operation there. The same fallback occurs when an accessible credential has an empty config or no redis_host value. An authenticated workflow author who supplies a credential ID they do not own, or one that was deleted, therefore obtains a read/write connection to whatever Redis is listening on the backend\u0027s loopback interface instead of an error. Impact depends on the deployment: the stock docker-compose.yml ships no Redis, in which case the flaw surfaces as a misleading connection error rather than data exposure.",
  "id": "GHSA-v44j-74xg-9j2q",
  "modified": "2026-09-27T03:31:06Z",
  "published": "2026-09-27T03:31:06Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/heymrun/heym/security/advisories/GHSA-fmpw-hj3m-xvj6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100860"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/heym-before-0.0.105-authentication-bypass-via-redis-node"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.6.3"
      },
      "package": {
        "ecosystem": "RubyGems",
        "name": "net-imap"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.6.0"
            },
            {
              "fixed": "0.6.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.5.13"
      },
      "package": {
        "ecosystem": "RubyGems",
        "name": "net-imap"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.5.0"
            },
            {
              "fixed": "0.5.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.4.23"
      },
      "package": {
        "ecosystem": "RubyGems",
        "name": "net-imap"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.4.0"
            },
            {
              "fixed": "0.4.24"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.3.9"
      },
      "package": {
        "ecosystem": "RubyGems",
        "name": "net-imap"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.3.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42246"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-392",
      "CWE-393",
      "CWE-636",
      "CWE-754",
      "CWE-841"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-04T22:01:52Z",
    "nvd_published_at": "2026-05-09T20:16:28Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\nA man-in-the-middle attacker can cause `Net::IMAP#starttls` to return \"successfully\", without starting TLS.\n\n### Details\n\nWhen using `Net::IMAP#starttls` to upgrade a plaintext connection to use TLS, a man-in-the-middle attacker can inject a tagged `OK` response with an easily predictable tag.  By sending the response before the client finishes sending the command, the command completes \"successfully\" before the response handler is registered.  This allows `#starttls` to return without error, but the response handler is never invoked, the TLS connection is never established, and the socket remains unencrypted.\n\nThis allows man-in-the-middle attackers to perform a STARTTLS stripping attack, unless the client code explicitly checks `Net::IMAP#tls_verified?`.\n\n### Impact\n\nTLS bypass, leading to cleartext transmission of sensitive information.\n\n### Mitigation\n\n* Upgrade to a patched version of net-imap that raises an exception whenever `#starttls` does not establish TLS.\n* Connect to an implicit TLS port, rather than use `STARTTLS` with a cleartext port.\n  This is strongly recommended anyway:\n  * [RFC 8314](https://www.rfc-editor.org/info/rfc8314): Cleartext Considered Obsolete: Use of Transport Layer Security (TLS) for Email Submission and Access\n  * [NO STARTTLS](https://nostarttls.secvuln.info/): Why TLS is better without STARTTLS, A Security Analysis of STARTTLS in the Email Context\n* Explicitly verify `Net::IMAP#tls_verified?` is `true`, before using the connection after `#starttls`.",
  "id": "GHSA-vcgp-9326-pqcp",
  "modified": "2026-05-14T20:48:01Z",
  "published": "2026-05-04T22:01:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ruby/net-imap/security/advisories/GHSA-vcgp-9326-pqcp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42246"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ruby/net-imap/commit/0ede4c40b1523dfeaf95777b2678e54cc0fd9618"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ruby/net-imap/commit/24a4e770b43230286a05aa2a9746cdbb3eb8485e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ruby/net-imap/commit/97e2488fb5401a1783bddd959dde007d9fbce42c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ruby/net-imap/commit/f79d35bf5833f186e81044c57c843eda30c873da"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ruby/net-imap"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ruby/net-imap/releases/tag/v0.3.10"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ruby/net-imap/releases/tag/v0.4.24"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ruby/net-imap/releases/tag/v0.5.14"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ruby/net-imap/releases/tag/v0.6.4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/net-imap/CVE-2026-42246.yml"
    },
    {
      "type": "WEB",
      "url": "https://nostarttls.secvuln.info"
    },
    {
      "type": "WEB",
      "url": "https://www.rfc-editor.org/info/rfc8314"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "net-imap vulnerable to STARTTLS stripping via invalid response timing"
}

{
  "affected": [],
  "aliases": [
    "CVE-2025-41760"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-636"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-09T09:16:00Z",
    "severity": "MODERATE"
  },
  "details": "An administrator may attempt to block all traffic by configuring a pass filter with an empty table. However, in UBR, an empty list does not enforce any restrictions and allows all network traffic to pass unfiltered.",
  "id": "GHSA-vjr8-6jjg-p3hj",
  "modified": "2026-03-09T09:30:30Z",
  "published": "2026-03-09T09:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-41760"
    },
    {
      "type": "WEB",
      "url": "https://www.mbs-solutions.de/mbs-2025-0001"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "OpenClaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.3.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-636"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-07T18:10:17Z",
    "nvd_published_at": "2026-03-31T12:16:29Z",
    "severity": "LOW"
  },
  "details": "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-qvr7-g57c-mrc7. This link is maintained to preserve external references.\n\n### Original Description\nOpenClaw before 2026.3.11 contains a credential fallback vulnerability where unavailable local gateway.auth.token and gateway.auth.password SecretRefs are treated as unset, allowing fallback to remote credentials in local mode. Attackers can exploit misconfigured local auth references to cause CLI and helper paths to select incorrect credential sources, potentially bypassing intended local authentication boundaries.",
  "id": "GHSA-vm29-7mq3-9jrg",
  "modified": "2026-04-07T18:10:17Z",
  "published": "2026-03-31T12:31:35Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-qvr7-g57c-mrc7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32970"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openclaw-credential-fallback-logic-bypass-via-unavailable-local-auth-secretrefs"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Duplicate Advisory: OpenClaw: Unavailable local auth SecretRefs could fall through to remote credentials in local mode",
  "withdrawn": "2026-04-07T18:10:17Z"
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pyopenssl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.14.0"
            },
            {
              "fixed": "26.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-27448"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-636"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-16T15:15:43Z",
    "nvd_published_at": "2026-03-18T00:16:19Z",
    "severity": "LOW"
  },
  "details": "If a user provided callback to `set_tlsext_servername_callback` raised an unhandled exception, this would result in a connection being accepted. If a user was relying on this callback for any security-sensitive behavior, this could allow bypassing it.\n\nUnhandled exceptions now result in rejecting the connection.\n\nCredit to **Leury Castillo** for reporting this issue.",
  "id": "GHSA-vp96-hxj8-p424",
  "modified": "2026-03-19T18:28:02Z",
  "published": "2026-03-16T15:15:43Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pyca/pyopenssl/security/advisories/GHSA-vp96-hxj8-p424"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27448"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pyca/pyopenssl/commit/d41a814759a9fb49584ca8ab3f7295de49a85aa0"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pyca/pyopenssl"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pyca/pyopenssl/blob/358cbf29c4e364c59930e53a270116249581eaa3/CHANGELOG.rst#L27"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "pyOpenSSL allows TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback"
}