CVE-2021-39935
GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 24 February 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 36.14% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 3 February 2026 · due 24 February 2026
- Weakness
- CWE-918
- Affected
- gitlab/gitlab
- Source
- cve@gitlab.com
EPSS 36.1% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://about.gitlab.com/releases/2021/12/06/security-release-gitlab-14-5-2-released/ ; https://nvd.nist.gov/vuln/detail/CVE-2021-39935
References
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.jsonThird Party Advisory
- https://gitlab.com/gitlab-org/gitlab/-/issues/346187Issue Tracking, Vendor Advisory
- https://hackerone.com/reports/1236965Permissions Required, Third Party Advisory
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.jsonThird Party Advisory
- https://gitlab.com/gitlab-org/gitlab/-/issues/346187Issue Tracking, Vendor Advisory
- https://hackerone.com/reports/1236965Permissions Required, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39935US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.