CVE-2026-12910

EUVD-2026-78909
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 27.46%
Affected Products (NVD)
VendorProductVersion
gitlabgitlab
18.6.0 ≤
𝑥
< 19.1.8
gitlabgitlab
19.2.0 ≤
𝑥
< 19.2.6
gitlabgitlab
19.3.0 ≤
𝑥
< 19.3.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://gitlab.com/gitlab-org/gitlab/-/work_items/603742
https://hackerone.com/reports/3745561