CVE-2025-12029: GitLab

High severity, CVSS 8.0. EPSS: 0.5% chance of exploitation in the next 30 days.

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.11 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have, under certain circumstances, allowed an unauthenticated user to perform unauthorized actions on behalf of another user by injecting malicious external scripts into the Swagger UI."

Affected products

• GitLab GitLab: from 15.11.0, before 18.4.6 (fixed in 18.4.6); from 18.5.0, before 18.5.4 (fixed in 18.5.4); from 18.6.0, before 18.6.2 (fixed in 18.6.2)

Published 2025-12-11. Last modified 2026-06-17.