CVE-2026-12910

Missing Authentication for Critical Function in GitLab

State: Published
Severity: 5.4 Medium
Published: Sep 15, 2026
Updated: Sep 20, 2026
Reserved: Jun 22, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N	GitLab

Weaknesses

CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
GitLabGitLab	18.6 to before 19.1.8Affected 19.2 to before 19.2.6Affected 19.3 to before 19.3.2Affected

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/603742
HackerOne Bug Bounty Report #3745561technical-descriptionexploitpermissions-required

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