{"id":"UBUNTU-CVE-2023-3424","details":"An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.3 before 15.11.10, all versions starting from 16.0 before 16.0.6, all versions starting from 16.1 before 16.1.1. A Regular Expression Denial of Service was possible via sending crafted payloads to the preview_markdown endpoint.","modified":"2025-10-24T05:01:24Z","published":"2023-07-13T03:15:00Z","upstream":["CVE-2023-3424"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-3424"},{"type":"REPORT","url":"https://hackerone.com/reports/1960970"},{"type":"REPORT","url":"https://gitlab.com/gitlab-org/gitlab/-/issues/409802"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-3424"}],"affected":[{"package":{"name":"gitlab","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/gitlab@8.5.8+dfsg-5?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.3+dfsg-9","8.4.3+dfsg-12","8.5.8+dfsg-5"],"ecosystem_specific":{"binaries":[{"binary_name":"gitlab","binary_version":"8.5.8+dfsg-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-3424.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}