Auth bypass in Gitlab
CVE-2026-1663
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.4 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user with group import permissions to create labels in priva…
Vulnerability class: Broken Access Control
EPSS: 0.000 (3.7th 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:N/I:L/A:N.
Affected products
- Gitlab — versions 14.4, 18.8, 18.9
Weakness classification (CWE)
References
- HackerOne Bug Bounty Report #3485548 (technical-description, exploit, permissions-required)
- gitlab.com/gitlab-org/gitlab/-/work_items/588207
- about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/
Frequently asked questions
- What is CVE-2026-1663?
- CVE-2026-1663 is a medium-severity vulnerability in Gitlab, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-03-11.
- How severe is CVE-2026-1663?
- Medium severity. CVSS v3 base score is 4.3 out of 10.