Vulnerability Description
GitLab has remediated an issue in GitLab EE affecting all versions from 16.4 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary client-side code in the context of another user's session, due to improper sanitization of user-supplied input.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gitlab | Gitlab | >= 16.4.0, < 18.11.6 |
Related Weaknesses (CWE)
References
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/PatchRelease NotesVendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/work_items/601634Broken Link
- https://hackerone.com/reports/3734800Permissions Required
FAQ
What is CVE-2026-10086?
CVE-2026-10086 is a vulnerability with a CVSS score of 8.7 (HIGH). GitLab has remediated an issue in GitLab EE affecting all versions from 16.4 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticate...
How severe is CVE-2026-10086?
CVE-2026-10086 has been rated HIGH with a CVSS base score of 8.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-10086?
Check the references section above for vendor advisories and patch information. Affected products include: Gitlab Gitlab.