CVE-2021-39935

MEDIUM6.8

CISA KEV

Published 2021-12-13 · Updated 2026-06-17 · Source cve@gitlab.com

Summary

CVE-2021-39935 is a medium-severity (CVSS 6.8) vulnerability in GitLab Community and Enterprise Editions. CISA added it to the Known Exploited Vulnerabilities catalog on February 3, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by February 24, 2026. CISA does not currently list it as used in ransomware campaigns. GitLab has 6 vulnerabilities in the KEV catalog, 1 of them linked to ransomware.

All 6 known-exploited GitLab vulnerabilities →

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:H/PR:N/UI:N/S:C/C:H/I:N/A:N

CWE-918CWE-918

CISA Known-Exploited Vulnerability

Product: GitLab — Community and Enterprise Editions

Name: GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability

Date added: 2026-02-03 · Due: 2026-02-24

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

More exploited GitLab vulnerabilities

Most recently added to CISA KEV

CVE-2026-97229
Community Edition and Enterprise Edition — GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound Vulnerability
added 2026-10-29
CVE-2026-85706
Community Edition and Enterprise Edition — GitLab Community Edition and Enterprise Edition Path Traversal Vulnerability
added 2026-09-11
CVE-2021-22175
GitLab — GitLab Server-Side Request Forgery (SSRF) Vulnerability
added 2026-02-18
CVE-2023-7028
GitLab CE/EE — GitLab Community and Enterprise Editions Improper Access Control Vulnerability
added 2024-05-01
CVE-2021-22205
RANSOMWARE
Community and Enterprise Editions — GitLab Community and Enterprise Editions Remote Code Execution Vulnerability
added 2021-11-03

View all →

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