CVE entry · CVE-2021-39935
CVE-2021-39935: GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability
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.
- Actively exploited: added to CISA’s KEV catalog on February 3, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: February 24, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes GitLab Community and Enterprise Editions, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (about.gitlab.com)
- NVD entry (NIST)
- CISA KEV catalog