On 2026-02-03, CISA added CVE-2021-39935 (GitLab Community and Enterprise Editions) to its Known Exploited Vulnerabilities (KEV) catalog [2]. The vulnerability is listed in the catalog as "GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability" [2]. CISA requires applying mitigations in accordance with vendor instructions; see the full text below for specific requirements [2].
Backfill: this event became public on Feb 3, 2026 and we added it on Nov 10, 2026. It is not a new event.
CISA Adds GitLab Community and Enterprise Editions Vulnerability CVE-2021-39935 to Known Exploited Vulnerabilities Catalog
1 min read
- Disclosed
- Feb 3, 2026
- Published
- Nov 10, 2026
- Last updated
- Nov 8, 2026
- CVSS basis
- Our assessment
- 36.1%, higher than 98% of CVEs
- Exploitation and patch status
- ExploitedKEV
- Attack vector
- Vulnerability status
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Government, Cross-industry
What to do nowOur advice
CISA requires applying mitigations in accordance with vendor instructions; see the full text for specific requirements [2].
Timeline
Technical details
CISA KEV Listing
On 2026-02-03, CISA added CVE-2021-39935 to the Known Exploited Vulnerabilities () catalog for GitLab Community and Enterprise Editions [2].
Original Technical Description
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. [2]
Official Requirements
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. [2]
Individual Vulnerability Record
The U.S. National Vulnerability Database (NVD) provides an independent vulnerability record and description for CVE-2021-39935 [1].
References
Official / primary3
- [1]
“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”
- [2]
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