A potential DOS vulnerability was discovered in GitLab CE/EE affecting all versions before 15.1.6, all versions starting from 15.2 before 15.2.4, all versions starting from 15.3 before 15.3.2. Malformed content added to the issue description could have been used to trigger high CPU usage.
Credits
Thanks legit-security(https://hackerone.com/legit-security) for reporting this vulnerability through our HackerOne bug bounty program