Medium severity4.3NVD Advisory· Published Dec 13, 2021· Updated Jun 17, 2026
CVE-2021-39933
CVE-2021-39933
Description
An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.10 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 used for handling user input (notes, comments, etc) was susceptible to catastrophic backtracking that could cause a DOS attack.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
6cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*+ 3 more
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*range: >=12.10.0,<14.3.6
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*range: >=12.10.0,<14.3.6
- (no CPE)range: <14.3.6, <14.4.4, <14.5.2
- (no CPE)range: >=12.10, <14.3.6
- Range: <14.3.6, <14.4.4, <14.5.2
Patches
Vulnerability mechanics
References
3- gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39933.jsonnvdThird Party Advisory
- hackerone.com/reports/1320077nvdPermissions RequiredThird Party Advisory
- gitlab.com/gitlab-org/gitlab/-/issues/340449nvdBroken Link
News mentions
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