CVE-2026-117500 (GCVE-0-2026-117500)

Vulnerability from cvelistv5 – Published: 2026-10-28 17:17 – Updated: 2026-10-28 17:17
VLAI
Title
HTTP::Body versions before 1.24_01 for Perl allow CPU exhaustion via regex backtracking on the filename of a multipart upload
Summary
HTTP::Body versions before 1.24_01 for Perl allow CPU exhaustion via regex backtracking on the filename of a multipart upload. For every file part, the multipart parser finds the suffix of the uploaded filename by matching the default $basename_regexp, qr/[^.]+(\.[^\\\/]+)$/, against the whole basename. A basename made of many dots and ending in a backslash makes the regex backtrack in time quadratic in its length. A remote attacker can exhaust CPU with one request, as a basename of about 32 KB takes several seconds to match and every file part is matched separately.
Severity
No CVSS data available.
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
Assigner
CPANSec CNA under the redhat root
CNA scorecard C 62/100 over 337 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Affected: 0 , < 1.24_01 (custom)
Show details on NVD website
To clipboard 

{
  "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/MultiPart.pm"
          ],
          "programRoutines": [
            {
              "name": "HTTP::Body::MultiPart::handler"
            }
          ],
          "repo": "https://github.com/libwww-perl/HTTP-Body",
          "versions": [
            {
              "lessThan": "1.24_01",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "HTTP::Body versions before 1.24_01 for Perl allow CPU exhaustion via regex backtracking on the filename of a multipart upload.\n\nFor every file part, the multipart parser finds the suffix of the uploaded filename by matching the default $basename_regexp, qr/[^.]+(\\.[^\\\\\\/]+)$/, against the whole basename. A basename made of many dots and ending in a backslash makes the regex backtrack in time quadratic in its length.\n\nA remote attacker can exhaust CPU with one request, as a basename of about 32 KB takes several seconds to match and every file part is matched separately."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1333",
              "description": "CWE-1333 Inefficient Regular Expression Complexity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T17:17:11.051Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/libwww-perl/HTTP-Body/commit/9ab46daaede02fb13ea55a7e3ede34c8b918d8ca.patch"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/libwww-perl/HTTP-Body/commit/3abc958d78bd84bf4abb87bad79b9432eab7e694.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/GETTY/HTTP-Body-1.24_01/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to HTTP-Body 1.24_01 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "HTTP::Body versions before 1.24_01 for Perl allow CPU exhaustion via regex backtracking on the filename of a multipart upload",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-117500",
    "datePublished": "2026-10-28T17:17:11.051Z",
    "dateReserved": "2026-10-27T08:44:49.796Z",
    "dateUpdated": "2026-10-28T17:17:11.051Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-117500",
      "date": "2026-10-30",
      "epss": "0.00264",
      "percentile": "0.18394"
    },
    "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/MultiPart.pm"
                ],
                "programRoutines": [
                  {
                    "name": "HTTP::Body::MultiPart::handler"
                  }
                ],
                "repo": "https://github.com/libwww-perl/HTTP-Body",
                "versions": [
                  {
                    "lessThan": "1.24_01",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "HTTP::Body versions before 1.24_01 for Perl allow CPU exhaustion via regex backtracking on the filename of a multipart upload.\n\nFor every file part, the multipart parser finds the suffix of the uploaded filename by matching the default $basename_regexp, qr/[^.]+(\\.[^\\\\\\/]+)$/, against the whole basename. A basename made of many dots and ending in a backslash makes the regex backtrack in time quadratic in its length.\n\nA remote attacker can exhaust CPU with one request, as a basename of about 32 KB takes several seconds to match and every file part is matched separately."
          }
        ],
        "id": "CVE-2026-117500",
        "lastModified": "2026-10-29T15:11:53.000",
        "metrics": {},
        "published": "2026-10-28T18:17:14.747",
        "references": [
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://github.com/libwww-perl/HTTP-Body/commit/3abc958d78bd84bf4abb87bad79b9432eab7e694.patch"
          },
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            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://github.com/libwww-perl/HTTP-Body/commit/9ab46daaede02fb13ea55a7e3ede34c8b918d8ca.patch"
          },
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://metacpan.org/release/GETTY/HTTP-Body-1.24_01/changes"
          }
        ],
        "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-1333"
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-10-30T15:08:48+00:00",
      "cve": "CVE-2026-117500",
      "id": "CVE-2026-117500",
      "initial_release_date": "2026-10-28T17:17:11.051000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "perl-HTTP-Body: perl-HTTP-Body: Denial of Service via regular expression backtracking",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-117500.json",
      "version": "3"
    }
  }
}



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