{"id":"CVE-2021-39917","details":"An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.9 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. A regular expression related to quick actions features was susceptible to catastrophic backtracking that could cause a DOS attack.","aliases":["BIT-gitlab-2021-39917"],"modified":"2026-08-27T18:53:27.475532Z","published":"2021-12-13T16:15:08.913Z","references":[{"type":"ADVISORY","url":"https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39917.json"},{"type":"REPORT","url":"https://gitlab.com/gitlab-org/gitlab/-/issues/338486"},{"type":"REPORT","url":"https://hackerone.com/reports/1277918"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.com/gitlab-org/gitlab","events":[{"introduced":"073a4ba8016203c9e48595afd3ddea430d9420a3"},{"fixed":"057790c613dea428aa523357c333ced5433794ee"},{"introduced":"19c719febd74b6edf549bf6a2c0e36bf8f176d56"},{"fixed":"a1175384df48e74899d664520601823016d81084"},{"introduced":"490a8efda84a04e31ac41b882d95bb717c202437"},{"fixed":"4511944420f00a68d5df2b3d81e5dae7fa2888f3"}],"database_specific":{"cpe":["cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*","cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*"],"extracted_events":[{"introduced":"12.9.0"},{"fixed":"14.3.6"},{"introduced":"14.4.0"},{"fixed":"14.4.4"},{"introduced":"14.5.0"},{"fixed":"14.5.2"}],"source":"CPE_RANGE"}}],"versions":["v14.5.1-ee","v14.4.3-ee","v14.5.0-ee","v14.4.2-ee","v14.4.0-ee"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-39917.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}