Auth bypass in GitLab
CVE-2026-1751
A vulnerability has been discovered in GitLab CE/EE affecting all versions starting with 16.8 before 18.5.0 that could have allowed unauthorized edits to merge request approval rules under certain conditions.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (12.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.9% 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: 0.002 · change: +0.000
Affected products
- GitLab — versions 16.8
Weakness classification (CWE)
References
- gitlab.com/gitlab-org/gitlab/-/issues/519340 (issue-tracking, Exploit, permissions-required, Issue Tracking, Vendor Advisory)
- hackerone.com/reports/2980839 (Permissions Required, technical-description, permissions-required, exploit)
Frequently asked questions
- What is CVE-2026-1751?
- CVE-2026-1751 is a low-severity vulnerability in GitLab, classified under Missing Authorization. CVSS score: 3.1/10. Published 2026-02-02.
- How severe is CVE-2026-1751?
- Low severity. CVSS v3 base score is 3.1 out of 10.