HIGH CISA KEV

CVE-2021-39935

CVSS v3

7.5

HIGH

EPSS Score

54.3%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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

CISA Known Exploited Vulnerability

Date Added
2/3/2026
Patch Due Date
2/24/2026
Ransomware Use
Unknown

Technical details

Published
12/13/2021

Frequently asked questions

What is CVE-2021-39935?

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

Is CVE-2021-39935 actively exploited?

Yes. CVE-2021-39935 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2/24/2026.

What is the CVSS score for CVE-2021-39935?

CVE-2021-39935 has a CVSS v3 base score of 7.5 (HIGH severity).

Is CVE-2021-39935 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

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