CVE-2026-12910CWE-306

CVE-2026-12910

Medium · published September 15, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
9.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00201 · 9.5th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-09-15T22:17Z
Affected products (6)
ProductVersionsFixed in
gitlab/gitlab≥ 18.6.0, < 19.1.819.1.8
gitlab/gitlab≥ 18.6.0, < 19.1.819.1.8
gitlab/gitlab≥ 19.2.0, < 19.2.619.2.6
gitlab/gitlab≥ 19.2.0, < 19.2.619.2.6
gitlab/gitlab≥ 19.3.0, < 19.3.219.3.2
gitlab/gitlab≥ 19.3.0, < 19.3.219.3.2
References (2)
https://gitlab.com/gitlab-org/gitlab/-/work_items/603742 · [email protected]https://hackerone.com/reports/3745561 · [email protected]
EPSS history
Timeline
  • 17 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 15 SEP 17:36Z
    Missing Authentication for Critical Function in GitLab
    cvelistv5