CVE-2021-4236

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

Web Sockets do not execute any AuthenticateMethod methods which may be set, leading to a nil pointer dereference if the returned UserData pointer is assumed to be non-nil, or authentication bypass. This issue only affects WebSockets with an AuthenticateMethod hook. Request handlers that do not explicitly use WebSockets are not vulnerable.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-476

Affected software

No affected versions have been published.

Timeline

Published
Dec 27, 2022
Last modified
Jun 17, 2026
NVD status
Modified

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