CVE-2026-39974
unknown
CVSS v3
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CVSS v4 NEW
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VIR risk
—
Description
n8n-mcp has authenticated SSRF via instance-URL header in multi-tenant HTTP mode
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| npm | n8n-mcp | <2.47.4 | 2.47.4 |
References
- https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-4ggg-h7ph-26qr
- https://nvd.nist.gov/vuln/detail/CVE-2026-39974
- https://github.com/czlonkowski/n8n-mcp/commit/d9d847f230923d96e0857ccecf3a4dedcc9b0096
- https://github.com/czlonkowski/n8n-mcp
- https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.47.4
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.