Vulnerability in Gitlab
CVE-2026-5816
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to imp…
EPSS: 0.000 (4.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N.
Affected products
- Gitlab — versions 18.10, 18.11
Weakness classification (CWE)
References
- HackerOne Bug Bounty Report #3572231 (technical-description, exploit, permissions-required)
- gitlab.com/gitlab-org/gitlab/-/work_items/592816
- about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/
Frequently asked questions
- What is CVE-2026-5816?
- CVE-2026-5816 is a high-severity vulnerability in Gitlab, classified under CWE-41. CVSS score: 8.0/10. Published 2026-04-22.
- How severe is CVE-2026-5816?
- High severity. CVSS v3 base score is 8.0 out of 10.