CVE-2026-10086: GitLab

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• GitLab GitLab: from 16.4.0, before 18.11.6 (fixed in 18.11.6); from 19.0.0, before 19.0.3 (fixed in 19.0.3); version 19.1.0 only

Published 2026-06-25. Last modified 2026-06-26.