CVE-2023-3994 Information

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 9.3 before 16.0.8 all versions starting from 16.1 before 16.1.3 all versions starting from 16.2 before 16.2.2. A Regular Expression Denial of Service was possible via sending crafted payloads which use ProjectReferenceFilter to the preview_markdown endpoint.

Reference

https://gitlab.com/gitlab-org/gitlab/-/issues/416225 https://hackerone.com/reports/1963255