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Vulnerability record · CVE-2026-25119 · published 24 June 2026

CVE-2026-25119: Authentication bypass by spoofing vulnerability

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.

7.7 CVSS 4.0 High EPSS 0.86% · top 43.0% CWE-290 · Authentication bypass by spoofing Deferred
7.7CVSS 4.0 base score
0.86%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
25 Jun 2026Last modified by NVD

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.

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/gogs/gogs/commit/0089c4c8e5b8d99eb6e5c8727f8f40d765f1f58a
https://github.com/gogs/gogs/pull/8264
https://github.com/gogs/gogs/releases/tag/v0.14.3
https://github.com/gogs/gogs/security/advisories/GHSA-w6j9-vw59-27wv
https://github.com/gogs/gogs/security/advisories/GHSA-w6j9-vw59-27wv

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Source: NIST National Vulnerability Database (record CVE-2026-25119), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.