CVE-2023-2199: GitLab

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.0 before 15.10.8, all versions starting from 15.11 before 15.11.7, all versions starting from 16.0 before 16.0.2. A Regular Expression Denial of Service was possible via sending crafted payloads to the preview_markdown endpoint.

Affected products

• GitLab GitLab: from 12.0.0, before 15.10.8 (fixed in 15.10.8); from 15.11.0, before 15.11.7 (fixed in 15.11.7); from 16.0.0, before 16.0.2 (fixed in 16.0.2)

Published 2023-06-07. Last modified 2026-06-17.