CVE-2026-2973: GitLab

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

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.7 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to execute arbitrary JavaScript in a user's browser due to improper sanitization of entity-encoded content in Mermaid diagrams.

Affected products

• GitLab GitLab: from 17.7.0, 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.