An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.0 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Using large payloads, the diff feature could be used to trigger high load time for users reviewing code changes.
https://gitlab.com/gitlab-org/gitlab/-/issues/217360
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39932.json