An issue was discovered in GitLab Community and Enterprise Edition before 11.2.7, 11.3.x before 11.3.8, and 11.4.x before 11.4.3. It has Information Exposure Through an Error Message.
https://gitlab.com/gitlab-org/gitlab-ce/issues/50975
https://about.gitlab.com/2018/10/29/security-release-gitlab-11-dot-4-dot-3-released/