GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability (CVE-2021-39935)
Severity: high · Patch status: unknown · Since 2026-02-03 · CVE-2021-39935
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. CISA added CVE-2021-39935 to its Known Exploited Vulnerabilities catalog on Feb 3, 2026, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Feb 24, 2026 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch