An issue was discovered in GitLab Enterprise Edition before 11.7.11, 11.8.x before 11.8.7, and 11.9.x before 11.9.7. It allows Information Disclosure.
https://about.gitlab.com/blog/categories/releases/
https://about.gitlab.com/2019/04/10/critical-security-release-gitlab-11-dot-9-dot-7-released/