A potential DoS vulnerability was discovered in GitLab CE/EE starting with version 13.7. Using a malformed TIFF images was possible to trigger memory exhaustion.
https://hackerone.com/reports/1330882
https://gitlab.com/gitlab-org/gitlab/-/issues/341363
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39912.json