n8n versions before 2.32.1 contain a server-side request forgery protection bypass vulnerability in the MCP Client node that allows authenticated users to bypass SSRF protections. Attackers can craft workflows that send requests to internal or blocked hosts without routing through SSRF protection, exposing internal services and reading responses back through the workflow.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://github.com/n8n-io/n8n/security/advisories/GHSA-vhf8-cg2h-cg3p Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.4 · n8nNVD modified 2026-10-23 19:10
Affected (CPE criteria) 2
cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*cpe:2.3:a:n8n:n8n:2.32.0:*:*:*:*:node.js:*:*
References 2
- https://github.com/n8n-io/n8n/security/advisories/GHSA-vhf8-cg2h-cg3p Mitigation, Vendor Advisory
- https://www.vulncheck.com/advisories/n8n-before-ssrf-protection-bypass-via-mcp-client Third Party Advisory