A denial of service vulnerability in all versions of GitLab CE/EE before 13.12.2, 13.11.5 or 13.10.5 allows an attacker to cause uncontrolled resource consumption with a specially crafted issue or merge request
https://hackerone.com/reports/1090049
https://gitlab.com/gitlab-org/gitlab/-/issues/300709
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22217.json