CVE-2026-104380
mediumPunk 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.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- 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 9b29abf9-4ab0-4765-b253-1875cd9b441e
- http://www.openwall.com/lists/oss-security/2026/10/06/1 af854a3a-2127-422b-91ae-364da2661108