Auth bypass in GitLab
CVE-2026-10518
GitLab has remediated an issue in GitLab EE affecting all versions from 17.9 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user with guest-level permissions to read private security policy content they were not authorized to access due to improper authorization enforcement.
Vulnerability class: Broken Access Control
Published · last modified .
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:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
Weakness classification (CWE)
References
- gitlab.com/gitlab-org/gitlab/-/work_items/601723
- hackerone.com/reports/3686230 (technical-description, permissions-required, exploit)
- docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-1-released/
Frequently asked questions
- What is CVE-2026-10518?
- CVE-2026-10518 is a medium-severity vulnerability in GitLab, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-09-29.
- How severe is CVE-2026-10518?
- Medium severity. CVSS v3 base score is 4.3 out of 10.