In GitLab before 13.0.12, 13.1.6 and 13.2.3 using a branch with a hexadecimal name could override an existing hash.
{ "cpes": [ "cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*", "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*" ], "severity": "Medium" }