CVE DATABASE / CVE-2021-39935
CVE-2021-39935
GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability
Confirmed exploited in the wild. Added 2026-02-03.
Federal remediation due 2026-02-24.
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.
Summary
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 3.1 breakdown
| Base score | 6.8 (MEDIUM) |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N |
| Attack vector | NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | CHANGED |
| Confidentiality | HIGH |
| Integrity | NONE |
| Availability | NONE |
Weakness type (CWE)
Affected products
Use our free CVE Lookup tool for the latest NVD record, or browse the full CISA KEV catalog.
References
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.json
- https://gitlab.com/gitlab-org/gitlab/-/issues/346187
- https://hackerone.com/reports/1236965
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39935
Data: NIST NVD + CISA KEV. NVD last modified 2026-02-04. Always verify against the vendor advisory before acting.