{"id":"CVE-2023-6736","aliases":["BIT-gitlab-2023-6736","EUVD-2023-58949","GHSA-4fr5-6ccq-75w2","UBUNTU-CVE-2023-6736"],"status":"published","title":"Inefficient Regular Expression Complexity in GitLab","description":"An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.7.6, all versions starting from 16.8 before 16.8.3, all versions starting from 16.9 before 16.9.1. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00643,"percentile":0.51359,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1333","CWE-400"],"published":"2024-02-07T22:02:30Z","modified":"2026-10-28T02:30:30Z","fixes":[{"ecosystem":"Bitnami","package":"gitlab","fixed_in":["16.7.6","16.8.3","16.9.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"gitlab","ranges":[{"type":"SEMVER","events":[{"introduced":"11.3.0"},{"fixed":"16.7.6"},{"introduced":"16.8.0"},{"fixed":"16.8.3"},{"introduced":"16.9.0"},{"fixed":"16.9.1"}]}]},{"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/435036","tags":["issue-tracking","permissions-required","x_transferred","Issue Tracking","Vendor Advisory","advisory","report"]},{"url":"https://hackerone.com/reports/2269023","tags":["technical-description","exploit","permissions-required","x_transferred","Permissions Required","Technical Description","article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6736","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-4fr5-6ccq-75w2"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6736.json","tags":["advisory"]},{"url":"git://git@gitlab.com:gitlab-org/gitlab.git","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2023-6736","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-6736","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-6736","title":"Inefficient Regular Expression Complexity in GitLab","description":"An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.7.6, all versions starting from 16.8 before 16.8.3, all versions starting from 16.9 before 16.9.1. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.","status":"published","published":"2024-02-07T22:02:30.947Z","modified":"2026-04-24T04:07:14.453Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:35:25.095989Z"}],"euvd":[{"id":"EUVD-2023-58949","description":"An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.7.6, all versions starting from 16.8 before 16.8.3, all versions starting from 16.9 before 16.9.1. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.","status":"published","published":"2024-02-07T22:02:30Z","modified":"2026-04-24T04:07:14Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T19:24:18.636842Z"}],"ghsa":[{"id":"GHSA-4fr5-6ccq-75w2","title":"An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.6.7...","description":"An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.6.7, all versions starting from 16.7 before 16.7.5, all versions starting from 16.8 before 16.8.2. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.","status":"published","published":"2024-02-08T00:32:19Z","modified":"2024-10-03T09:30:35Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-400","CWE-1333"],"updated_at":"2026-11-02T14:58:24.112371Z"}],"nvd":[{"id":"CVE-2023-6736","description":"An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.7.6, all versions starting from 16.8 before 16.8.3, all versions starting from 16.9 before 16.9.1. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.","status":"published","published":"2024-02-07T22:15:09.043Z","modified":"2026-06-17T06:51:19.627Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:09:04.527564Z"}],"osv":[{"id":"CVE-2023-6736","title":"Inefficient Regular Expression Complexity in GitLab","description":"An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.7.6, all versions starting from 16.8 before 16.8.3, all versions starting from 16.9 before 16.9.1. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.","status":"published","published":"2024-02-07T22:02:30.947Z","modified":"2026-10-28T02:30:30.49901601Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T15:44:36.851042Z"},{"id":"UBUNTU-CVE-2023-6736","description":"An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.7.6, all versions starting from 16.8 before 16.8.3, all versions starting from 16.9 before 16.9.1. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.","status":"published","published":"2024-02-07T22:15:00Z","modified":"2025-10-24T05:01:40Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:54:41.555387Z"},{"id":"BIT-gitlab-2023-6736","title":"Inefficient Regular Expression Complexity in GitLab","description":"An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.7.6, all versions starting from 16.8 before 16.8.3, all versions starting from 16.9 before 16.9.1. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.","status":"published","published":"2024-03-06T10:54:14.703Z","modified":"2026-09-08T08:47:43.560158448Z","updated_at":"2026-11-02T15:28:30.405543Z"}]}}