A collision in access memoization logic in all versions of GitLab CE/EE before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, leads to potential elevated privileges in groups and projects under rare circumstances
https://gitlab.com/gitlab-org/gitlab/-/issues/336802
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39937.json