CVE-2026-44694: n8n-mcp webhook and API client paths has an authenticated SSRF

May 8, 2026

Authenticated Server-Side Request Forgery affecting the webhook trigger tools, the n8n API client (N8N_API_URL), and per-request URLs supplied via the x-n8n-url header in multi-tenant HTTP mode.

References

github.com/advisories/GHSA-cmrh-wvq6-wm9r
github.com/czlonkowski/n8n-mcp
github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9r
nvd.nist.gov/vuln/detail/CVE-2026-44694

Code Behaviors & Features

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