High severity · published Dec 13, 2021
CVE-2021-39935
GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability
In wildKEV
7.5
CVSS
36.1%
EPSS
Yes
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)36.1% · higher than 98% of CVEs
Exploited in the wildYes
CISA KEVListed Feb 3, 2026
Federal remediation dueFeb 24, 2026
Ransomware campaign useNot known
Affected products
Which versions
GI
GitLab · GitLab
>=10.5, <14.3.6; >=14.4, <14.4.4; >=14.5, <14.5.2 · source: vendor, NVD, KEV
In the news
VulnerabilityHigh
[CISA KEV] CVE-2021-39935: GitLab Community and Enterprise Editions - GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability
GitLab Community and Enterprise Editions contain a server-side request forgery vulnerability which could allow unauthorized external users to perform Server Side Requests via the CI Lint API.
CACommunity and Enterprise EditionsCVE-2021-39935
Feb 3, 2026·CISA KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-39935
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-39935
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://gitlab.com/gitlab-org/gitlab/-/issues/346187
x_refsource_MISC
https://hackerone.com/reports/1236965
x_refsource_CONFIRM
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.json
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