Auth bypass in Gitlab
CVE-2026-2726
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.10 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to perform unauthorized actions on merge requests in…
Vulnerability class: Broken Access Control
EPSS: 0.000 (5.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Gitlab — versions 11.10, 18.9, 18.10
Weakness classification (CWE)
References
- HackerOne Bug Bounty Report #3543886 (technical-description, exploit, permissions-required)
- gitlab.com/gitlab-org/gitlab/-/work_items/590717
- about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/
Frequently asked questions
- What is CVE-2026-2726?
- CVE-2026-2726 is a medium-severity vulnerability in Gitlab, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-03-25.
- How severe is CVE-2026-2726?
- Medium severity. CVSS v3 base score is 4.3 out of 10.