CVE-2026-3857: GitLab

High severity, CVSS 8.8. EPSS: 0.3% chance of exploitation in the next 30 days.

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.10 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an unauthenticated user to execute arbitrary GraphQL mutations on behalf of authenticated users due to insufficient CSRF protection.

Affected products

• GitLab GitLab: from 17.10.0, before 18.8.7 (fixed in 18.8.7); from 18.9.0, before 18.9.3 (fixed in 18.9.3); version 18.10.0 only

Published 2026-03-25. Last modified 2026-06-17.