Main Vulnerability Database Vulnerabilities #VU149014

Improper Authentication in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2026-12910

Published: September 11, 2026

Vulnerability identifier: #VU149014

CSH Severity: Low

CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-12910

CWE-ID: CWE-287

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to bypass SAML SSO sign-in restrictions and authenticate without SSO.

The vulnerability exists due to missing authentication enforcement checks in SAML SSO sign-in restriction enforcement when processing sign-in requests. A remote user can bypass SAML SSO sign-in restrictions to authenticate without SSO.

Affected software

Gitlab Community Edition
GitLab Enterprise Edition

How to mitigate CVE-2026-12910

Install security update from vendor's website.

Gitlab Community Edition - addressed in versions 19.1.8, 19.2.6, 19.3.2
GitLab Enterprise Edition - addressed in versions 19.1.8, 19.2.6, 19.3.2

External References

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-2-released/

Related Security Bulletins