Auth bypass in GitLab
CVE-2026-4916
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user with custom role permissions to demote or remove higher-privileged group members due to improper authorization checks on member management operations.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- GitLab — versions 18.2, 18.9, 18.10
Weakness classification (CWE)
References
- hackerone.com/reports/3301240 (Permissions Required, technical-description, permissions-required, exploit)
- gitlab.com/gitlab-org/gitlab/-/work_items/565414 (Broken Link)
- about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-4916?
- CVE-2026-4916 is a low-severity vulnerability in GitLab, classified under Missing Authorization. CVSS score: 2.7/10. Published 2026-04-08.
- How severe is CVE-2026-4916?
- Low severity. CVSS v3 base score is 2.7 out of 10.