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CVE-2021-39935

Server-Side Request Forgery (SSRF) — is CVE-2021-39935real, exploitable, or a false positive? Here's the community ground truth.

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Medium · CVSS 6.8EPSS 30.5%CISA KEVCWE-918 · Server-Side Request Forgery (SSRF)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

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

References

NVD MITRE CVE.org CISA KEV

Published

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Community ground truth

Community verdict

3 verdicts
Not a real issue

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Community real-world severity: High (High 3) — CVSS base score 6.8

Practitioners rate this higher than its CVSS — treat with extra caution.

Field notes & remediation

Verdicts are the quick signal — notes are the evidence and fixes behind them.

  • 0
    Field note · Marco FerriCurated

    GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability — 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. Listed in the CISA KEV catalog (added 2026-02-03) — confirmed exploited in the wild, not theoretical. FIRST EPSS puts the chance of exploitation in the next 30 days at ~30%. Treat it as real and prioritize remediation over triage.

  • 0
    Remediation · Waleed AzizCurated

    Required action for GitLab Community and Enterprise Editions: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA set a federal remediation due date of 2026-02-24. After patching, verify the vulnerable path is no longer reachable before closing the finding.

Related CVEs

Same weakness — CWE-918 · Server-Side Request Forgery (SSRF).