GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.7 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that under certain conditions could have allowed an authenticated user to access CI data from a different ref type than intended.
https://gitlab.com/gitlab-org/gitlab/-/work_items/570059
https://about.gitlab.com/releases/2026/05/27/patch-release-gitlab-19-0-1-released/