Vulnerability-Lookup

GHSA-JMH5-FMFV-H6F8

Vulnerability from github – Published: 2026-10-25 18:31 – Updated: 2026-10-26 03:30

Details

HTTP::Server::PSGI versions before 1.0056 for Perl allow a single request to crash the server by declaring a large Content-Length.

The request body is read with sysread() calls sized by the remaining Content-Length. Perl grows the read buffer to the requested length before any data arrives, so the server tries to allocate as much memory as the client declares.

A remote attacker can send one request with a large Content-Length and a few body bytes, and perl exits with an out-of-memory error before the application is called. HTTP::Server::PSGI runs as a single process, so the server stays down until restarted.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-115825"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-789"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-25T17:17:01Z",
    "severity": null
  },
  "details": "HTTP::Server::PSGI versions before 1.0056 for Perl allow a single request to crash the server by declaring a large Content-Length.\n\nThe request body is read with sysread() calls sized by the remaining Content-Length. Perl grows the read buffer to the requested length before any data arrives, so the server tries to allocate as much memory as the client declares.\n\nA remote attacker can send one request with a large Content-Length and a few body bytes, and perl exits with an out-of-memory error before the application is called. HTTP::Server::PSGI runs as a single process, so the server stays down until restarted.",
  "id": "GHSA-jmh5-fmfv-h6f8",
  "modified": "2026-10-26T03:30:23Z",
  "published": "2026-10-25T18:31:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115825"
    },
    {
      "type": "WEB",
      "url": "https://github.com/plack/Plack/commit/11545871cadc5df1b744cebb429cfeb4ebc1069a.patch"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/MIYAGAWA/Plack-1.0056/changes"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/10/26/10"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-115825 (GCVE-0-2026-115825)

Vulnerability from cvelistv5 – Published: 2026-10-25 16:51 – Updated: 2026-10-26 01:23

Title

HTTP::Server::PSGI versions before 1.0056 for Perl allow a single request to crash the server by declaring a large Content-Length

Summary

HTTP::Server::PSGI versions before 1.0056 for Perl allow a single request to crash the server by declaring a large Content-Length. The request body is read with sysread() calls sized by the remaining Content-Length. Perl grows the read buffer to the requested length before any data arrives, so the server tries to allocate as much memory as the client declares. A remote attacker can send one request with a large Content-Length and a few body bytes, and perl exits with an out-of-memory error before the application is called. HTTP::Server::PSGI runs as a single process, so the server stays down until restarted.

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 298 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/plack/Plack/commit/11545871cad…	patch
https://metacpan.org/release/MIYAGAWA/Plack-1.005…	release-notes
http://www.openwall.com/lists/oss-security/2026/1…

Impacted products

1 product

Vendor	Product	Version
		Affected: 0 , < 1.0056 (custom)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-10-26T01:23:53.588Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/10/26/10"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "HTTP::Server::PSGI"
          ],
          "packageName": "Plack",
          "packageURL": "pkg:cpan/Plack",
          "programFiles": [
            "lib/HTTP/Server/PSGI.pm"
          ],
          "programRoutines": [
            {
              "name": "HTTP::Server::PSGI::handle_connection"
            }
          ],
          "repo": "https://github.com/plack/Plack",
          "versions": [
            {
              "lessThan": "1.0056",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "HTTP::Server::PSGI versions before 1.0056 for Perl allow a single request to crash the server by declaring a large Content-Length.\n\nThe request body is read with sysread() calls sized by the remaining Content-Length. Perl grows the read buffer to the requested length before any data arrives, so the server tries to allocate as much memory as the client declares.\n\nA remote attacker can send one request with a large Content-Length and a few body bytes, and perl exits with an out-of-memory error before the application is called. HTTP::Server::PSGI runs as a single process, so the server stays down until restarted."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-789",
              "description": "CWE-789 Memory Allocation with Excessive Size Value",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-25T16:51:54.897Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/plack/Plack/commit/11545871cadc5df1b744cebb429cfeb4ebc1069a.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/MIYAGAWA/Plack-1.0056/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Plack 1.0057 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "HTTP::Server::PSGI versions before 1.0056 for Perl allow a single request to crash the server by declaring a large Content-Length",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-115825",
    "datePublished": "2026-10-25T16:51:54.897Z",
    "dateReserved": "2026-10-23T16:47:20.192Z",
    "dateUpdated": "2026-10-26T01:23:53.588Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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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