Medium 6.8Known exploited (CISA KEV)Published Dec 13, 2021

CVE-2021-39935An 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.

Updated under an hour ago (2026-10-19 06:30 UTC)

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It affects GitLab. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Feb 3, 2026; federal agencies had to remediate by Feb 24, 2026. Treat that date as your deadline.

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Exploited in the last 30 days

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: 6.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness (CWE): CWE-918
Known exploited: Added to CISA KEV Feb 3, 2026; federal remediation due Feb 24, 2026Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 36.14% (percentile 98)
Assigned by: GitLab
NVD analysis: Analyzed
Record last updated: Feb 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

GitLab GitLab gitlab:gitlab (from the name)	from 10.5, <14.3.6; from 14.4, <14.4.4; from 14.5, <14.5.2	CNA record
gitlab gitlab gitlab:gitlab	from 10.5.0 before 14.3.6; from 10.5.0 before 14.3.6; from 14.4.0 before 14.4.4; from 14.4.0 before 14.4.4; from 14.5.0 before 14.5.2; from 14.5.0 before 14.5.2	NVD

References

https://gitlab.com/gitlab-org/gitlab/-/issues/346187x-refsource-misc, issue-tracking, vendor-advisory
https://hackerone.com/reports/1236965x-refsource-misc, permissions-required, third-party-advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.jsonx-refsource-confirm, third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39935us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.