Vulnerability-Lookup

GHSA-CMH9-2WR3-4X64

Vulnerability from github – Published: 2026-10-06 03:31 – Updated: 2026-10-06 06:30

Details

Punk versions from 0.48 before 0.55 for Perl route Extended CONNECT requests to any GET route without an Origin check in ps_serve_one.

On HTTP/2 and HTTP/3 a WebSocket handshake arrives as an Extended CONNECT, which is matched as a GET and so reaches every GET route, API operation and mount. The Origin check runs only when a websocket route matches. On this transport the handler's status is the handshake response, and a 2xx accepts it.

A cross-origin page can open a WebSocket to any path and learn from its open or error event whether that path returns 2xx.

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-104380"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1385"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-06T02:17:03Z",
    "severity": null
  },
  "details": "Punk versions from 0.48 before 0.55 for Perl route Extended CONNECT requests to any GET route without an Origin check in ps_serve_one.\n\nOn HTTP/2 and HTTP/3 a WebSocket handshake arrives as an Extended CONNECT, which is matched as a GET and so reaches every GET route, API operation and mount. The Origin check runs only when a websocket route matches. On this transport the handler\u0027s status is the handshake response, and a 2xx accepts it.\n\nA cross-origin page can open a WebSocket to any path and learn from its open or error event whether that path returns 2xx.",
  "id": "GHSA-cmh9-2wr3-4x64",
  "modified": "2026-10-06T06:30:28Z",
  "published": "2026-10-06T03:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104380"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/LNATION/Punk-0.55/changes"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/LNATION/Punk-0.55/diff/LNATION/Punk-0.54"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/10/06/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-104380 (GCVE-0-2026-104380)

Vulnerability from cvelistv5 – Published: 2026-10-06 01:13 – Updated: 2026-10-06 05:07

Title

Punk versions from 0.48 before 0.55 for Perl route Extended CONNECT requests to any GET route without an Origin check in ps_serve_one

Summary

Punk versions from 0.48 before 0.55 for Perl route Extended CONNECT requests to any GET route without an Origin check in ps_serve_one. On HTTP/2 and HTTP/3 a WebSocket handshake arrives as an Extended CONNECT, which is matched as a GET and so reaches every GET route, API operation and mount. The Origin check runs only when a websocket route matches. On this transport the handler's status is the handshake response, and a 2xx accepts it. A cross-origin page can open a WebSocket to any path and learn from its open or error event whether that path returns 2xx.

Severity

No CVSS data available.

CWE

CWE-1385 - Missing Origin Validation in WebSockets

Assigner

CPANSec redhat root Scorecard

References

3 references

URL	Tags
https://metacpan.org/release/LNATION/Punk-0.55/di…	patch
https://metacpan.org/release/LNATION/Punk-0.55/changes	release-notes
http://www.openwall.com/lists/oss-security/2026/10/06/1

Impacted products

1 product

Vendor	Product	Version
		Affected: 0.48 , < 0.55 (custom)

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JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-10-06T05:07:59.987Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/10/06/1"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Punk"
          ],
          "packageName": "Punk",
          "packageURL": "pkg:cpan/Punk",
          "programFiles": [
            "include/punk/punk_serve.h"
          ],
          "programRoutines": [
            {
              "name": "ps_serve_one"
            }
          ],
          "versions": [
            {
              "lessThan": "0.55",
              "status": "affected",
              "version": "0.48",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Punk versions from 0.48 before 0.55 for Perl route Extended CONNECT requests to any GET route without an Origin check in ps_serve_one.\n\nOn HTTP/2 and HTTP/3 a WebSocket handshake arrives as an Extended CONNECT, which is matched as a GET and so reaches every GET route, API operation and mount. The Origin check runs only when a websocket route matches. On this transport the handler\u0027s status is the handshake response, and a 2xx accepts it.\n\nA cross-origin page can open a WebSocket to any path and learn from its open or error event whether that path returns 2xx."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1385",
              "description": "CWE-1385 Missing Origin Validation in WebSockets",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T01:13:14.558Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://metacpan.org/release/LNATION/Punk-0.55/diff/LNATION/Punk-0.54"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/LNATION/Punk-0.55/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Punk 0.55 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Punk versions from 0.48 before 0.55 for Perl route Extended CONNECT requests to any GET route without an Origin check in ps_serve_one",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-104380",
    "datePublished": "2026-10-06T01:13:14.558Z",
    "dateReserved": "2026-10-01T22:29:10.271Z",
    "dateUpdated": "2026-10-06T05:07:59.987Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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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.

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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GHSA-CMH9-2WR3-4X64

CVE-2026-104380 (GCVE-0-2026-104380)

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