An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.3 before 15.11.10, all versions starting from 16.0 before 16.0.6, all versions starting from 16.1 before 16.1.1. A Regular Expression Denial of Service was possible via sending crafted payloads to the preview_markdown endpoint.
| Software | From | Fixed in |
|---|---|---|
| gitlab / gitlab | 16.0.0 | 16.0.6 |
| gitlab / gitlab | 16.1.0 | 16.1.1 |
| gitlab / gitlab | 10.3.0 | 15.11.10 |