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CVE-2021-39935

MEDIUMCISA KEV

6.8

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

CVE Details

CVSS v3.1 Score6.8

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published12/13/2021

Last Modified2/4/2026

Sourcekev

Honeypot Sightings0

CISA KEV

VendorGitLab

ProductCommunity and Enterprise Editions

Vulnerability NameGitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability

KEV Date Added2026-02-03

Remediation Due Date2026-02-24

Ransomware UseUnknown

Affected Products

gitlab:gitlab

Weaknesses (CWE)

CWE-918CWE-918

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.json(cve@gitlab.com)

https://gitlab.com/gitlab-org/gitlab/-/issues/346187(cve@gitlab.com)

https://hackerone.com/reports/1236965(cve@gitlab.com)

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.json(af854a3a-2127-422b-91ae-364da2661108)

https://gitlab.com/gitlab-org/gitlab/-/issues/346187(af854a3a-2127-422b-91ae-364da2661108)

https://hackerone.com/reports/1236965(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39935(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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