CVE-2021-39935

State: Published
Severity: 6.8 Medium
Published: Dec 13, 2021
Updated: Feb 3, 2026
Reserved: Aug 23, 2021

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.5 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Unauthorized external users could perform Server Side Requests via the CI Lint API

Scores

CVSS	Score	Vector	Source
3.1	6.8 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N	GitLab

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
GitLabGitLab	>=10.5, <14.3.6Affected >=14.4, <14.4.4Affected >=14.5, <14.5.2Affected

References

https://gitlab.com/gitlab-org/gitlab/-/issues/346187
https://hackerone.com/reports/1236965
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.json
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39935government-resource

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