Vulnerability-Lookup

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

Vulnerability from cvelistv5 – Published: 2026-10-06 01:13 – Updated: 2026-10-06 13:14

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

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-06 13:14 UTC

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	CPE status
		Affected: 0.48 , < 0.55 (custom)

Show details on NVD website

JSON

To clipboard

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        }
      ],
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    "dateReserved": "2026-10-01T22:29:10.271Z",
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          }
        ],
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          }
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        "vulnStatus": "Deferred",
        "weaknesses": [
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            "type": "Secondary"
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    "vulnrichment": {
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              "lang": "en",
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}

FKIE_CVE-2026-104380

Vulnerability from fkie_nvd - Published: 2026-10-06 02:17 - Updated: 2026-10-06 15:03

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/LNATION/Punk-0.55/changes
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/LNATION/Punk-0.55/diff/LNATION/Punk-0.54
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/10/06/1

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "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"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-104380",
  "lastModified": "2026-10-06T15:03:59.427",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
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          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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        },
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        "impactScore": 1.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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    ],
    "ssvcV203": [
      {
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            },
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          "version": "2.0.3"
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    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
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    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://metacpan.org/release/LNATION/Punk-0.55/diff/LNATION/Punk-0.54"
    },
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  "vulnStatus": "Deferred",
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          "lang": "en",
          "value": "CWE-1385"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}

GHSA-CMH9-2WR3-4X64

Vulnerability from github – Published: 2026-10-06 03:31 – Updated: 2026-10-06 15:31

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.

Severity

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "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": "MODERATE"
  },
  "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": "2026-10-06T15:31:49Z",
  "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": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

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

FKIE_CVE-2026-104380

GHSA-CMH9-2WR3-4X64

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Related by attack behaviour