The Auth0 integration in GitLab before 10.3.9, 10.4.x before 10.4.6, and 10.5.x before 10.5.6 has an incorrect omniauth-auth0 configuration, leading to signing in unintended users.
{ "binaries": [ { "binary_version": "8.5.8+dfsg-5", "binary_name": "gitlab" } ] }