CVE-2025-12571: GitLab

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.10 before 18.4.5, 18.5 before 18.5.3, and 18.6 before 18.6.1 that could have allowed an unauthenticated user to cause a Denial of Service condition by sending specifically crafted requests containing malicious JSON payloads.

Affected products

• GitLab GitLab: from 17.10.0, before 18.4.5 (fixed in 18.4.5); from 18.5.0, before 18.5.3 (fixed in 18.5.3); version 18.6.0 only

Published 2025-11-26. Last modified 2026-06-17.