Medium · published October 9, 2025
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 5.2 prior to 18.2.8, 18.3 prior to 18.3.4, and 18.4 prior to 18.4.2 that could have allowed an authenticated attacker to create a denial of service condition by configuring malicious webhook endpoints that send crafted HTTP responses.
| Product | Versions | Fixed in |
|---|---|---|
| gitlab/gitlab | ≥ 5.2.0, < 18.2.8 | 18.2.8 |
| gitlab/gitlab | ≥ 5.2.0, < 18.2.8 | 18.2.8 |
| gitlab/gitlab | ≥ 18.3.0, < 18.3.4 | 18.3.4 |
| gitlab/gitlab | ≥ 18.3.0, < 18.3.4 | 18.3.4 |
| gitlab/gitlab | ≥ 18.4.0, < 18.4.2 | 18.4.2 |
| gitlab/gitlab | ≥ 18.4.0, < 18.4.2 | 18.4.2 |