GitLab has remediated an issue in GitLab EE affecting all versions from 16.10 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that when instance-level approval rule editing prevention was enabled, could have allowed an authenticated user with Maintainer permissions to modify or delete project approval rules due to missing authorization checks.
https://hackerone.com/reports/3561092
https://gitlab.com/gitlab-org/gitlab/-/work_items/590983
https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/