A vulnerability, which was classified as problematic , was found in GitLab up to 19.0.5/19.1.3/19.2.1 . Impacted is an unknown function of the component Merge Request API Endpoint . Such manipulation leads to improper authorization. This vulnerability is traded as CVE-2026-4879 . The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.