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CVE-2026-104380

Punk · Vulnerability

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-104380

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-104380

Published

Punk

https://cpan.org/modules

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "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"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON