CVE-2021-4236

Published: Dec 27, 2022Modified: Jun 17, 2026

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: NVD

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.

Affected (1)

Products: Web Project: Web

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Web Project Web	From 1.4.0 to 1.5.2

Related CWEs

NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

References (4)

https://github.com/ecnepsnai/web/commit/5a78f8d5c41ce60dcf9f61aaf47a7a8dc3e0002f

Source: security@golang.org

PatchThird Party Advisory

https://pkg.go.dev/vuln/GO-2021-0107

Source: security@golang.org

ExploitPatchThird Party Advisory

https://github.com/ecnepsnai/web/commit/5a78f8d5c41ce60dcf9f61aaf47a7a8dc3e0002f

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://pkg.go.dev/vuln/GO-2021-0107

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitPatchThird Party Advisory

Timeline

No history available yet.