CVE-2021-39935

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Summary

CVECVE-2021-39935
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-12-13 16:15:00 UTC
Updated2021-12-15 17:14:00 UTC
DescriptionAn 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

Risk And Classification

EPSS: 0.414340000 probability, percentile 0.973780000 (date 2026-04-01)

CISA KEV: Listed on 2026-02-03; due 2026-02-24; ransomware use Unknown

Problem Types: CWE-918

CISA Known Exploited Vulnerability

VendorGitLab
ProductCommunity and Enterprise Editions
NameGitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability
Required ActionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Noteshttps://about.gitlab.com/releases/2021/12/06/security-release-gitlab-14-5-2-released/ ; https://nvd.nist.gov/vuln/detail/CVE-2021-39935

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gitlab Gitlab All All All All
Application Gitlab Gitlab All All All All

References

ReferenceSourceLinkTags
Not Found MISC gitlab.com
2021/CVE-2021-39935.json · master · GitLab.org / cves · GitLab CONFIRM gitlab.com
HackerOne MISC hackerone.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Vendor Comments And Credit

Discovery Credit

LEGACY: Thanks @minhli for reporting this vulnerability through our HackerOne bug bounty program

Legacy QID Mappings

  • 690733 Free Berkeley Software Distribution (FreeBSD) Security Update for gitlab (b299417a-5725-11ec-a587-001b217b3468)
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