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A Denial of Service (DoS) condition has been discovered in GitLab CE/EE affecting all versions from 7.10 prior before 16.11.5, version 17.0 before 17.0.3, and 17.1 before 17.1.1. It is possible for an attacker to cause a denial of service using a crafted markdown page.
Reserved 2024-04-22 | Published 2025-06-20 | Updated 2025-06-20 | Assigner GitLabCWE-1333: Inefficient Regular Expression Complexity
Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program
gitlab.com/gitlab-org/gitlab/-/issues/457474 (GitLab Issue #457474)
hackerone.com/reports/2024974 (HackerOne Bug Bounty Report #2024974)
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