UpHeron
All vulnerabilities

Servers and applications

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

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 3 Feb 2026.

Severity
High 7.5
Published
13 Dec 2021
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
14.3.6, 14.4.4, 14.5.2
Sources
NVD

Affected software

SoftwareAffected versions
GitLabServers and applications · cpe:a:gitlab:gitlab
  • From 10.5.0 before 14.3.6
  • From 14.4.0 before 14.4.4
  • From 14.5.0 before 14.5.2

Known exploited

CISA name
GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability
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.
Due for US agencies
24 Feb 2026
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-39935
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-39935