CVE-2026-5816

Description

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 improper path validation under certain conditions.

CVSS Vector

References

• https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/
• https://gitlab.com/gitlab-org/gitlab/-/work_items/592816
• https://hackerone.com/reports/3572231