GHSA-vhf8-cg2h-cg3p: n8n: SSRF Protection Bypass via MCP Client Node

July 22, 2026

On an n8n instance with SSRF protection enabled, the MCP Client node sent requests to a user-supplied endpoint without routing them through that protection and without pinning the resolved address. An authenticated user who could create or edit a workflow could therefore cause the server to connect to internal or otherwise blocked hosts and read the responses back through the workflow, exposing internal services the SSRF protection was meant to protect.

References

github.com/advisories/GHSA-vhf8-cg2h-cg3p
github.com/n8n-io/n8n/commit/f69dfc6dd2178a14ea1624d2e1d403c2e755042f
github.com/n8n-io/n8n/releases/tag/n8n@2.31.5
github.com/n8n-io/n8n/releases/tag/n8n@2.32.1
github.com/n8n-io/n8n/security/advisories/GHSA-vhf8-cg2h-cg3p

Code Behaviors & Features

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