Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gitlab | Gitlab | >= 18.10.0, < 18.10.4 |
Related Weaknesses (CWE)
References
- https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-releasRelease NotesVendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/work_items/592816Broken Link
- https://hackerone.com/reports/3572231Permissions Required
FAQ
What is CVE-2026-5816?
CVE-2026-5816 is a vulnerability with a CVSS score of 8.0 (HIGH). 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...
How severe is CVE-2026-5816?
CVE-2026-5816 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-5816?
Check the references section above for vendor advisories and patch information. Affected products include: Gitlab Gitlab.