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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Tue, 06 Oct 2026 21:15:00 +0000
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| Description | 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. | |
| 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 | |
| Weaknesses | CWE-1385 | |
| References |
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Status: PUBLISHED
Assigner: CPANSec
Published: 2026-10-06T01:13:14.558Z
Updated: 2026-10-06T13:14:39.875Z
Reserved: 2026-10-01T22:29:10.271Z
Link: CVE-2026-104380
Updated: 2026-10-06T05:07:59.987Z
Status : Deferred
Published: 2026-10-06T02:17:03.910
Modified: 2026-10-06T15:03:59.427
Link: CVE-2026-104380
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