Vulnerability advisory

CVE-2026-25119

Gogs: Authentication Bypass via Unvalidated Reverse Proxy Headers

Published Jun 24, 2026Updated Oct 28, 2026OSV record ↗

Also known as GHSA-w6j9-vw59-27wvGO-2026-5695

Severity

CVSS 4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

Affected versions

Repository

Affected commits	Fixed by commit
GIT github.com/gogs/gogs ↗
All commits before 3ba8aca90e17e5410b7e8b227c9f29256ac3e875	`3ba8aca90e17e5410b7e8b227c9f29256ac3e875`
Not specified	`0089c4c8e5b8d99eb6e5c8727f8f40d765f1f58a`
Also listed as affected (60) `v0.14.2-rc.1` `v0.14.2` `v0.14.1-rc.1` `v0.14.1` `v0.14.0-rc.1` `v0.14.0` `latest-commit-build` `v0.11.91` `v0.11.86` `v0.11.79` `v0.11.66` `v0.11.53` `v0.11.43` `v0.11.34` `v0.11.33` `v0.11.29` `v0.11.19` `v0.11.4` `v0.11` `v0.11rc` `v0.10.18` `v0.10.8` `v0.10` `v0.10rc` `v0.9.141` `v0.9.128` `v0.9.113` `v0.9.97` `v0.9.71` `v0.9.60` `v0.9.48` `v0.9.46` `v0.9.13` `v0.9.0` `v0.8.43` `v0.8.25` `v0.8.10` `v0.8.0` `v0.7.33` `v0.7.22` `v0.7.19` `v0.7.6` `v0.7.0` `v0.6.15` `v0.6.9` `v0.6.3` `v0.6.1` `v0.5.13` `v0.5.11` `v0.5.9` `v0.5.8` `v0.5.5` `v0.5.2` `v0.5.0` `v0.4.2` `v0.4.1` `v0.4.0` `v0.3.1` `v0.3.0` `v0.2.0`

Description

Gogs is an open source self-hosted Git service. Prior to 0.14.3, when ENABLE_REVERSE_PROXY_AUTHENTICATION is enabled, Gogs accepts the configured authentication header (default: X-WEBAUTH-USER) directly from client requests without validating that the request originated from a trusted reverse proxy. Any remote attacker who can reach the Gogs service can forge this header to impersonate any user or trigger automatic account creation, completely bypassing authentication. This vulnerability is fixed in 0.14.3.

CVE-2026-25119

Affected versions

Repository

Description

References