CVE-2026-12910

medium

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.

References

https://hackerone.com/reports/3745561

https://gitlab.com/gitlab-org/gitlab/-/work_items/603742

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-78909

Details

Source: Mitre, NVD

Published: 2026-09-15

Updated: 2026-09-28

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 5.4

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.0032