ACTIVELY EXPLOITED

CVE-2021-39935: GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability

Facts
VendorGitLab
ProductCommunity and Enterprise Editions
Actively exploitedYes
Added to CISA KEV3 Feb 2026
CISA federal deadline24 Feb 2026
Weakness (CWE)CWE-918

Required action (CISA's text)

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

Description (NVD)

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.

SOURCES

Other GitLab flaws

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.