CVE-2025-6454: GitLab

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue has been discovered in GitLab CE/EE affecting all versions from 16.11 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed authenticated users to make unintended internal requests through proxy environments by injecting crafted sequences.

Affected products

• GitLab GitLab: from 16.11.0, before 18.1.6 (fixed in 18.1.6); from 18.2.0, before 18.2.6 (fixed in 18.2.6); from 18.3.0, before 18.3.2 (fixed in 18.3.2)

Published 2025-09-12. Last modified 2026-06-17.