GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.0 before 18.6.6, 18.7 before 18.7.4, and 18.8 before 18.8.4 that, under certain conditions, could have allowed an authenticated user to perform server-side request forgery against internal services by bypassing protections in the Git repository import functionality.
Upgrade to versions 18.6.6, 18.7.4, 18.8.4 or above.