CVE-2025-5996: GitLab

Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days.

An issue has been discovered in GitLab CE/EE affecting all versions from 2.1.0 before 17.10.8, 17.11 before 17.11.4, and 18.0 before 18.0.2. A lack of input validation in HTTP responses could allow an authenticated user to cause denial of service.

Affected products

• GitLab GitLab: from 2.1.0, before 17.10.8 (fixed in 17.10.8); from 17.11.0, before 17.11.4 (fixed in 17.11.4); from 18.0.0, before 18.0.2 (fixed in 18.0.2)

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