{"id":"CVE-2023-3994","aliases":["BIT-gitlab-2023-3994","EUVD-2023-44617","GHSA-5jfm-fvc2-73xf","UBUNTU-CVE-2023-3994"],"status":"published","title":"Inefficient Regular Expression Complexity in GitLab","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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00958,"percentile":0.61711,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1333","CWE-400"],"published":"2023-08-02T00:06:50Z","modified":"2026-10-30T10:46:37Z","fixes":[{"ecosystem":"Bitnami","package":"gitlab","fixed_in":["16.0.8","16.1.3","16.2.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"gitlab","ranges":[{"type":"SEMVER","events":[{"introduced":"9.3.0"},{"fixed":"16.0.8"},{"introduced":"16.1.0"},{"fixed":"16.1.3"},{"introduced":"16.2.0"},{"fixed":"16.2.2"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gitlab","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.3+dfsg-9","8.4.3+dfsg-12","8.5.8+dfsg-5"]}],"products":[{"vendor":"gitlab","product":"gitlab"}],"references":[{"url":"https://gitlab.com/gitlab-org/gitlab/-/issues/416225","tags":["issue-tracking","permissions-required","x_transferred","Broken Link","web","report"]},{"url":"https://hackerone.com/reports/1963255","tags":["technical-description","exploit","permissions-required","x_transferred","Permissions Required","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-3994","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-5jfm-fvc2-73xf"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3994.json","tags":["advisory"]},{"url":"git://git@gitlab.com:gitlab-org/gitlab.git","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2023-3994","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-3994","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-3994","title":"Inefficient Regular Expression Complexity in GitLab","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.","status":"published","published":"2023-08-02T00:06:50.342Z","modified":"2026-04-27T04:06:31.406Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:35:24.360381Z"}],"euvd":[{"id":"EUVD-2023-44617","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.","status":"published","published":"2023-08-02T00:06:50Z","modified":"2026-04-27T04:06:31Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T19:24:17.84353Z"}],"ghsa":[{"id":"GHSA-5jfm-fvc2-73xf","title":"An issue has been discovered in GitLab CE/EE affecting all versions starting from 9.3 before 16.0...","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.","status":"published","published":"2023-08-02T03:30:20Z","modified":"2024-04-04T06:29:27Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-1333"],"updated_at":"2026-11-02T14:56:42.669106Z"}],"nvd":[{"id":"CVE-2023-3994","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.","status":"published","published":"2023-08-02T01:15:09.773Z","modified":"2026-06-17T06:15:39.307Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:08:18.687088Z"}],"osv":[{"id":"CVE-2023-3994","title":"Inefficient Regular Expression Complexity in GitLab","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.","status":"published","published":"2023-08-02T00:06:50.342Z","modified":"2026-10-30T10:46:37.016059639Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T15:44:33.244128Z"},{"id":"UBUNTU-CVE-2023-3994","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.","status":"published","published":"2023-08-02T01:15:00Z","modified":"2025-10-24T05:01:27Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:54:22.741943Z"},{"id":"BIT-gitlab-2023-3994","title":"Inefficient Regular Expression Complexity in GitLab","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.","status":"published","published":"2024-03-06T11:00:53.875Z","modified":"2025-05-20T10:02:07.006Z","updated_at":"2026-11-02T15:28:30.405543Z"}]}}