CVE-2026-12910 is a vulnerability in GitLab
Published on September 15, 2026
Missing Authentication for Critical Function in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.6 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could have allowed an authenticated user to bypass SAML SSO sign-in restrictions and authenticate without SSO due to missing authentication enforcement checks.
Vulnerability Analysis
CVE-2026-12910 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
Missing Authentication for Critical Function
The software does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Products Associated with CVE-2026-12910
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Affected Versions
GitLab:- Version 18.6 and below 19.1.8 is affected.
- Version 19.2 and below 19.2.6 is affected.
- Version 19.3 and below 19.3.2 is affected.