CVE-2025-22871 (GCVE-0-2025-22871)

Vulnerability from cvelistv5 – Published: 2025-04-08 20:04 – Updated: 2026-05-12 12:04
VLAI
Title
Request smuggling due to acceptance of invalid chunked data in net/http
Summary
The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-18 14:57 UTC
CWE
  • CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
Assigner
References
Impacted products
Vendor Product Version
Go standard library net/http/internal Affected: 0 , < 1.23.8 (semver)
Affected: 1.24.0-0 , < 1.24.2 (semver)
Create a notification for this product.
Siemens SENTRON 7KT PAC1261 Data Manager Affected: 0 , < V2.1.0 (custom)
Create a notification for this product.
Credits
Jeppe Bonde Weikop
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-04-08T21:03:21.913Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/04/04/4"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-22871",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-18T14:57:03.151639Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-18T14:57:31.331Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SENTRON 7KT PAC1261 Data Manager",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "V2.1.0",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-12T12:04:11.015Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-783943.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net/http/internal",
          "product": "net/http/internal",
          "programRoutines": [
            {
              "name": "readChunkLine"
            },
            {
              "name": "chunkedReader.Read"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.23.8",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.24.2",
              "status": "affected",
              "version": "1.24.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Jeppe Bonde Weikop"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request Smuggling\u0027)",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-04-08T20:04:34.769Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/652998"
        },
        {
          "url": "https://go.dev/issue/71988"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/Y2uBTVKjBQk"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2025-3563"
        }
      ],
      "title": "Request smuggling due to acceptance of invalid chunked data in net/http"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2025-22871",
    "datePublished": "2025-04-08T20:04:34.769Z",
    "dateReserved": "2025-01-08T19:11:42.834Z",
    "dateUpdated": "2026-05-12T12:04:11.015Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-22871",
      "date": "2026-10-14",
      "epss": "0.00826",
      "percentile": "0.56482"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://pkg.go.dev",
                "defaultStatus": "unaffected",
                "packageName": "net/http/internal",
                "product": "net/http/internal",
                "programRoutines": [
                  {
                    "name": "readChunkLine"
                  },
                  {
                    "name": "chunkedReader.Read"
                  }
                ],
                "vendor": "Go standard library",
                "versions": [
                  {
                    "lessThan": "1.23.8",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "1.24.2",
                    "status": "affected",
                    "version": "1.24.0-0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "security@golang.org"
          },
          {
            "affectedData": [
              {
                "defaultStatus": "unknown",
                "product": "SENTRON 7KT PAC1261 Data Manager",
                "vendor": "Siemens",
                "versions": [
                  {
                    "lessThan": "V2.1.0",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext."
          },
          {
            "lang": "es",
            "value": "El paquete net/http acepta incorrectamente un LF simple como terminador de l\u00ednea en l\u00edneas de datos fragmentados. Esto puede permitir el contrabando de solicitudes si se utiliza un servidor net/http junto con un servidor que acepta incorrectamente un LF simple como parte de una extensi\u00f3n fragmentada."
          }
        ],
        "id": "CVE-2025-22871",
        "lastModified": "2026-06-17T08:50:41.163",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 9.1,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.2,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2025-22871",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-18T14:57:03.151639Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-04-08T20:15:20.183",
        "references": [
          {
            "source": "security@golang.org",
            "url": "https://go.dev/cl/652998"
          },
          {
            "source": "security@golang.org",
            "url": "https://go.dev/issue/71988"
          },
          {
            "source": "security@golang.org",
            "url": "https://groups.google.com/g/golang-announce/c/Y2uBTVKjBQk"
          },
          {
            "source": "security@golang.org",
            "url": "https://pkg.go.dev/vuln/GO-2025-3563"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.openwall.com/lists/oss-security/2025/04/04/4"
          },
          {
            "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-783943.html"
          }
        ],
        "sourceIdentifier": "security@golang.org",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-13T03:00:52+00:00",
      "cve": "CVE-2025-22871",
      "id": "CVE-2025-22871",
      "initial_release_date": "2025-04-08T20:04:34.769000+00:00",
      "product_status:fixed": "6754",
      "product_status:known_affected": "67",
      "product_status:known_not_affected": "4570",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "net/http: Request smuggling due to acceptance of invalid chunked data in net/http",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-22871.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-10T02:19:15Z",
      "cve": "CVE-2025-22871",
      "id": "CVE-2025-22871",
      "initial_release_date": "2025-04-02T08:56:59Z",
      "product_status:known_affected": "48",
      "product_status:known_not_affected": "505",
      "product_status:recommended": "357",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-22871",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-22871.json",
      "version": "46"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2025-04-08T21:03:21.913Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "url": "http://www.openwall.com/lists/oss-security/2025/04/04/4"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "affected": [
              {
                "defaultStatus": "unknown",
                "product": "SENTRON 7KT PAC1261 Data Manager",
                "vendor": "Siemens",
                "versions": [
                  {
                    "lessThan": "V2.1.0",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-05-12T12:04:11.015Z",
              "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
              "shortName": "siemens-SADP"
            },
            "references": [
              {
                "url": "https://cert-portal.siemens.com/productcert/html/ssa-783943.html"
              }
            ],
            "x_adpType": "supplier"
          },
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "NETWORK",
                  "availabilityImpact": "NONE",
                  "baseScore": 9.1,
                  "baseSeverity": "CRITICAL",
                  "confidentialityImpact": "HIGH",
                  "integrityImpact": "HIGH",
                  "privilegesRequired": "NONE",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2025-22871",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-04-18T14:57:03.151639Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-04-18T14:57:25.000Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "collectionURL": "https://pkg.go.dev",
              "defaultStatus": "unaffected",
              "packageName": "net/http/internal",
              "product": "net/http/internal",
              "programRoutines": [
                {
                  "name": "readChunkLine"
                },
                {
                  "name": "chunkedReader.Read"
                }
              ],
              "vendor": "Go standard library",
              "versions": [
                {
                  "lessThan": "1.23.8",
                  "status": "affected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThan": "1.24.2",
                  "status": "affected",
                  "version": "1.24.0-0",
                  "versionType": "semver"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "value": "Jeppe Bonde Weikop"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request Smuggling\u0027)",
                  "lang": "en"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-04-08T20:04:34.769Z",
            "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
            "shortName": "Go"
          },
          "references": [
            {
              "url": "https://go.dev/cl/652998"
            },
            {
              "url": "https://go.dev/issue/71988"
            },
            {
              "url": "https://groups.google.com/g/golang-announce/c/Y2uBTVKjBQk"
            },
            {
              "url": "https://pkg.go.dev/vuln/GO-2025-3563"
            }
          ],
          "title": "Request smuggling due to acceptance of invalid chunked data in net/http"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "assignerShortName": "Go",
        "cveId": "CVE-2025-22871",
        "datePublished": "2025-04-08T20:04:34.769Z",
        "dateReserved": "2025-01-08T19:11:42.834Z",
        "dateUpdated": "2026-05-12T12:04:11.015Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.