A vulnerability was found in GitLab Community Edition and Enterprise Edition up to 18.11.5/19.0.2/19.1.0 and classified as problematic . Impacted is an unknown function of the component URL Validation Handler . Such manipulation leads to reliance on reverse dns resolution. This vulnerability is traded as CVE-2026-12635 . The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.