Auth bypass in Gitlab
CVE-2026-5377
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.1 that could have allowed an authenticated user to access titles of confidential or private issues in public projects due to improper access cont…
Vulnerability class: Broken Access Control
EPSS: 0.000 (4.2th 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:L/I:N/A:N.
Affected products
- Gitlab — versions 18.11
Weakness classification (CWE)
References
- gitlab.com/gitlab-org/gitlab/-/work_items/595553
- HackerOne Bug Bounty Report #3640688 (technical-description, exploit, permissions-required)
- about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/
Frequently asked questions
- What is CVE-2026-5377?
- CVE-2026-5377 is a medium-severity vulnerability in Gitlab, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-04-22.
- How severe is CVE-2026-5377?
- Medium severity. CVSS v3 base score is 4.3 out of 10.