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CVE record · CVE-2021-39935

Server-side request forgery in GitLab

CVSS 6.8 MediumCriticalIn CISA KEVEPSS 0.36 · 98th percentile

Critical, because:

  • In CISA’s KEV catalogue since 3 Feb 2026: it is known to be exploited.

How we decide what’s critical

Published by the CVE Program (CNA: GitLab) at 13 Dec 2021, 15:47 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
GitLab GitLab
  • affected >=10.5, <14.3.6
  • affected >=14.4, <14.4.4
  • affected >=14.5, <14.5.2
Identifiers
CVE-2021-39935
CNA
GitLab
Weakness (CWE)
CWE-918
Tags
Published
13 Dec 2021
Updated
3 Feb 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.8 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N CNA (GitLab)
  • CISA KEV Listed since 3 Feb 2026: known to be exploited.
  • EPSS 0.36, the 98th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 13 Dec 2021. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.