CVE-2026-104380

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 v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://metacpan.org/release/LNATION/Punk-0.55/changes
https://metacpan.org/release/LNATION/Punk-0.55/diff/LNATION/Punk-0.54
http://www.openwall.com/lists/oss-security/2026/10/06/1

Configurations

No configuration.

History

06 Oct 2026, 14:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.3

06 Oct 2026, 05:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/10/06/1 -

06 Oct 2026, 02:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-06 02:17

Updated : 2026-10-06 15:03

NVD link : CVE-2026-104380

Mitre link : CVE-2026-104380

CVE.ORG link : CVE-2026-104380

JSON object : View

Products Affected

No product.

CWE

CWE-1385

Missing Origin Validation in WebSockets

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