Auth bypass in GitLab
CVE-2026-6277
GitLab has remediated an issue in GitLab EE affecting all versions from 13.9 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user with Security Manager-role permissions to manage project security configuration even when the relevant feature was in a disabled state, due to incorrect 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:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- GitLab — versions 13.9, 18.11, 19.0
Weakness classification (CWE)
References
- about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/ (Release Notes)
- gitlab.com/gitlab-org/gitlab/-/work_items/596656 (Issue Tracking)
- hackerone.com/reports/3662615 (Permissions Required, technical-description, permissions-required, exploit)
Frequently asked questions
- What is CVE-2026-6277?
- CVE-2026-6277 is a medium-severity vulnerability in GitLab, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-06-11.
- How severe is CVE-2026-6277?
- Medium severity. CVSS v3 base score is 4.3 out of 10.