Vulnerability-Lookup

GHSA-38CX-9RF2-HQ5V

Vulnerability from github – Published: 2026-10-24 15:32 – Updated: 2026-10-24 18:33

Details

Web::Simple versions before 0.035 for Perl allocate a buffer sized by the Content-Length header for urlencoded body parameters.

Web::Dispatch::ParamParser::get_unpacked_body_from reads an application/x-www-form-urlencoded body using a single read call, with no cap and the return value ignored. Perl's read grows the buffer to the requested length before reading, so the declared Content-Length determines the allocation.

An attacker can trigger this through any route whose dispatch specification has a % body-parameter match, such as sub (POST + %name=), sending a Content-Length far larger than the body actually sent. No authentication is involved.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-114629"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-789"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-24T14:16:39Z",
    "severity": null
  },
  "details": "Web::Simple versions before 0.035 for Perl allocate a buffer sized by the Content-Length header for urlencoded body parameters.\n\nWeb::Dispatch::ParamParser::get_unpacked_body_from reads an application/x-www-form-urlencoded body using a single read call, with no cap and the return value ignored. Perl\u0027s read grows the buffer to the requested length before reading, so the declared Content-Length determines the allocation.\n\nAn attacker can trigger this through any route whose dispatch specification has a % body-parameter match, such as sub (POST + %name=), sending a Content-Length far larger than the body actually sent. No authentication is involved.",
  "id": "GHSA-38cx-9rf2-hq5v",
  "modified": "2026-10-24T18:33:59Z",
  "published": "2026-10-24T15:32:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114629"
    },
    {
      "type": "WEB",
      "url": "https://github.com/p5sagit/Web-Simple/commit/7e02c4f6204a2898938d357e6efe6dc2679af695.patch"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/ETHER/Web-Simple-0.035/changes"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/10/24/4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-114629 (GCVE-0-2026-114629)

Vulnerability from cvelistv5 – Published: 2026-10-24 13:50 – Updated: 2026-10-24 16:06

Title

Web::Simple versions before 0.035 for Perl allocate a buffer sized by the Content-Length header for urlencoded body parameters

Summary

Web::Simple versions before 0.035 for Perl allocate a buffer sized by the Content-Length header for urlencoded body parameters. Web::Dispatch::ParamParser::get_unpacked_body_from reads an application/x-www-form-urlencoded body using a single read call, with no cap and the return value ignored. Perl's read grows the buffer to the requested length before reading, so the declared Content-Length determines the allocation. An attacker can trigger this through any route whose dispatch specification has a % body-parameter match, such as sub (POST + %name=), sending a Content-Length far larger than the body actually sent. No authentication is involved.

Severity

No CVSS data available.

CWE

CWE-789 - Memory Allocation with Excessive Size Value

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 63/100 over 301 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/p5sagit/Web-Simple/commit/7e02…	patch
https://metacpan.org/release/ETHER/Web-Simple-0.0…	release-notes
http://www.openwall.com/lists/oss-security/2026/10/24/4

Impacted products

1 product

Vendor	Product	Version
		Affected: 0 , < 0.035 (custom)

Show details on NVD website

JSON

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  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-10-24T16:06:39.380Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/10/24/4"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Web::Simple"
          ],
          "packageName": "Web-Simple",
          "packageURL": "pkg:cpan/Web-Simple",
          "programFiles": [
            "lib/Web/Dispatch/ParamParser.pm"
          ],
          "programRoutines": [
            {
              "name": "Web::Dispatch::ParamParser::get_unpacked_body_from"
            }
          ],
          "repo": "https://github.com/p5sagit/Web-Simple",
          "versions": [
            {
              "lessThan": "0.035",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
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        }
      ],
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-789",
              "description": "CWE-789 Memory Allocation with Excessive Size Value",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
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      "providerMetadata": {
        "dateUpdated": "2026-10-24T13:50:47.616Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/p5sagit/Web-Simple/commit/7e02c4f6204a2898938d357e6efe6dc2679af695.patch"
        },
        {
          "tags": [
            "release-notes"
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          "url": "https://metacpan.org/release/ETHER/Web-Simple-0.035/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Web::Simple 0.035 or later, and in the application configure $Web::Dispatch::ParamParser::MAX_BODY_SIZE."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Web::Simple versions before 0.035 for Perl allocate a buffer sized by the Content-Length header for urlencoded body parameters",
      "workarounds": [
        {
          "lang": "en",
          "value": "For deployments that cannot upgrade but are running behind a reverse proxy, configure the proxy to reject requests above a maxiumum Content-Length."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-114629",
    "datePublished": "2026-10-24T13:50:47.616Z",
    "dateReserved": "2026-10-21T21:43:01.842Z",
    "dateUpdated": "2026-10-24T16:06:39.380Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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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