A potential DOS vulnerability was discovered in GitLab versions 13.1, 13.2 and 13.3. The api to update an asset as a link from a release had a regex check which caused exponential number of backtracks for certain user supplied values resulting in high CPU usage.
https://hackerone.com/reports/870820
https://gitlab.com/gitlab-org/gitlab/-/issues/218753
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13333.json