Vulnerability-Lookup

CVE-2026-116531 (GCVE-0-2026-116531)

Vulnerability from cvelistv5 – Published: 2026-10-28 17:16 – Updated: 2026-10-28 17:16

Title

HTTP::Body versions before 1.23_01 for Perl lose track of chunk boundaries in chunked request bodies when a read ends inside a chunk

Summary

HTTP::Body versions before 1.23_01 for Perl lose track of chunk boundaries in chunked request bodies when a read ends inside a chunk. In chunked mode, used when no content length is given, add() treats a chunk as complete once the buffer is as long as the chunk's declared size, but the buffer still holds the chunk-size line. When a read ends in the last bytes of a chunk, add() takes the chunk short and parses the leftover data as the next chunk-size line. A remote attacker can make a chunked body never complete, hanging a server that reads until the body is done, and may make it complete early, leaving the remaining bytes to be read as the next request.

Severity

No CVSS data available.

CWE

CWE-130 - Improper Handling of Length Parameter Inconsistency

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 62/100 over 337 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/libwww-perl/HTTP-Body/commit/5…	patch
https://metacpan.org/release/GETTY/HTTP-Body-1.24…	release-notes

Impacted products

1 product

Vendor	Product	Version	CPE status
		Affected: 0 , < 1.23_01 (custom)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "HTTP::Body"
          ],
          "packageName": "HTTP-Body",
          "packageURL": "pkg:cpan/HTTP-Body",
          "programFiles": [
            "lib/HTTP/Body.pm"
          ],
          "programRoutines": [
            {
              "name": "HTTP::Body::add"
            }
          ],
          "repo": "https://github.com/libwww-perl/HTTP-Body",
          "versions": [
            {
              "lessThan": "1.23_01",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "HTTP::Body versions before 1.23_01 for Perl lose track of chunk boundaries in chunked request bodies when a read ends inside a chunk.\n\nIn chunked mode, used when no content length is given, add() treats a chunk as complete once the buffer is as long as the chunk\u0027s declared size, but the buffer still holds the chunk-size line. When a read ends in the last bytes of a chunk, add() takes the chunk short and parses the leftover data as the next chunk-size line.\n\nA remote attacker can make a chunked body never complete, hanging a server that reads until the body is done, and may make it complete early, leaving the remaining bytes to be read as the next request."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-130",
              "description": "CWE-130 Improper Handling of Length Parameter Inconsistency",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T17:16:42.065Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/libwww-perl/HTTP-Body/commit/5869dde9fe6d13f189a435b6583fd63fcc18677a.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/GETTY/HTTP-Body-1.24/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to HTTP-Body 1.23_01 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "HTTP::Body versions before 1.23_01 for Perl lose track of chunk boundaries in chunked request bodies when a read ends inside a chunk",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-116531",
    "datePublished": "2026-10-28T17:16:42.065Z",
    "dateReserved": "2026-10-26T14:17:16.250Z",
    "dateUpdated": "2026-10-28T17:16:42.065Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-116531",
      "date": "2026-10-30",
      "epss": "0.00288",
      "percentile": "0.21431"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://cpan.org/modules",
                "defaultStatus": "unaffected",
                "modules": [
                  "HTTP::Body"
                ],
                "packageName": "HTTP-Body",
                "packageURL": "pkg:cpan/HTTP-Body",
                "programFiles": [
                  "lib/HTTP/Body.pm"
                ],
                "programRoutines": [
                  {
                    "name": "HTTP::Body::add"
                  }
                ],
                "repo": "https://github.com/libwww-perl/HTTP-Body",
                "versions": [
                  {
                    "lessThan": "1.23_01",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "HTTP::Body versions before 1.23_01 for Perl lose track of chunk boundaries in chunked request bodies when a read ends inside a chunk.\n\nIn chunked mode, used when no content length is given, add() treats a chunk as complete once the buffer is as long as the chunk\u0027s declared size, but the buffer still holds the chunk-size line. When a read ends in the last bytes of a chunk, add() takes the chunk short and parses the leftover data as the next chunk-size line.\n\nA remote attacker can make a chunked body never complete, hanging a server that reads until the body is done, and may make it complete early, leaving the remaining bytes to be read as the next request."
          }
        ],
        "id": "CVE-2026-116531",
        "lastModified": "2026-10-29T15:11:53.000",
        "metrics": {},
        "published": "2026-10-28T18:17:14.013",
        "references": [
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://github.com/libwww-perl/HTTP-Body/commit/5869dde9fe6d13f189a435b6583fd63fcc18677a.patch"
          },
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://metacpan.org/release/GETTY/HTTP-Body-1.24/changes"
          }
        ],
        "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-130"
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-10-30T15:04:30+00:00",
      "cve": "CVE-2026-116531",
      "id": "CVE-2026-116531",
      "initial_release_date": "2026-10-28T17:16:42.065000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "perl-http-body: HTTP::Body: Denial of Service via improper chunked request body parsing",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-116531.json",
      "version": "3"
    }
  }
}

FKIE_CVE-2026-116531

Vulnerability from fkie_nvd - Published: 2026-10-28 18:17 - Updated: 2026-10-29 15:11

Severity

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/libwww-perl/HTTP-Body/commit/5869dde9fe6d13f189a435b6583fd63fcc18677a.patch
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/GETTY/HTTP-Body-1.24/changes

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "HTTP::Body"
          ],
          "packageName": "HTTP-Body",
          "packageURL": "pkg:cpan/HTTP-Body",
          "programFiles": [
            "lib/HTTP/Body.pm"
          ],
          "programRoutines": [
            {
              "name": "HTTP::Body::add"
            }
          ],
          "repo": "https://github.com/libwww-perl/HTTP-Body",
          "versions": [
            {
              "lessThan": "1.23_01",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "HTTP::Body versions before 1.23_01 for Perl lose track of chunk boundaries in chunked request bodies when a read ends inside a chunk.\n\nIn chunked mode, used when no content length is given, add() treats a chunk as complete once the buffer is as long as the chunk\u0027s declared size, but the buffer still holds the chunk-size line. When a read ends in the last bytes of a chunk, add() takes the chunk short and parses the leftover data as the next chunk-size line.\n\nA remote attacker can make a chunked body never complete, hanging a server that reads until the body is done, and may make it complete early, leaving the remaining bytes to be read as the next request."
    }
  ],
  "id": "CVE-2026-116531",
  "lastModified": "2026-10-29T15:11:53.000",
  "metrics": {},
  "published": "2026-10-28T18:17:14.013",
  "references": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://github.com/libwww-perl/HTTP-Body/commit/5869dde9fe6d13f189a435b6583fd63fcc18677a.patch"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://metacpan.org/release/GETTY/HTTP-Body-1.24/changes"
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-130"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}

GHSA-288C-CM7P-6MC5

Vulnerability from github – Published: 2026-10-28 18:32 – Updated: 2026-10-28 18:32

Details

HTTP::Body versions before 1.23_01 for Perl lose track of chunk boundaries in chunked request bodies when a read ends inside a chunk.

In chunked mode, used when no content length is given, add() treats a chunk as complete once the buffer is as long as the chunk's declared size, but the buffer still holds the chunk-size line. When a read ends in the last bytes of a chunk, add() takes the chunk short and parses the leftover data as the next chunk-size line.

A remote attacker can make a chunked body never complete, hanging a server that reads until the body is done, and may make it complete early, leaving the remaining bytes to be read as the next request.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-116531"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-130"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-28T18:17:14Z",
    "severity": null
  },
  "details": "HTTP::Body versions before 1.23_01 for Perl lose track of chunk boundaries in chunked request bodies when a read ends inside a chunk.\n\nIn chunked mode, used when no content length is given, add() treats a chunk as complete once the buffer is as long as the chunk\u0027s declared size, but the buffer still holds the chunk-size line. When a read ends in the last bytes of a chunk, add() takes the chunk short and parses the leftover data as the next chunk-size line.\n\nA remote attacker can make a chunked body never complete, hanging a server that reads until the body is done, and may make it complete early, leaving the remaining bytes to be read as the next request.",
  "id": "GHSA-288c-cm7p-6mc5",
  "modified": "2026-10-28T18:32:13Z",
  "published": "2026-10-28T18:32:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116531"
    },
    {
      "type": "WEB",
      "url": "https://github.com/libwww-perl/HTTP-Body/commit/5869dde9fe6d13f189a435b6583fd63fcc18677a.patch"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/GETTY/HTTP-Body-1.24/changes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2026-116531 (GCVE-0-2026-116531)

FKIE_CVE-2026-116531

GHSA-288C-CM7P-6MC5

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