n8n-MCP — Ssrf (CVE-2026-44694)
Date: 2026-05
Affected: n8n-mcp/n8n-mcp
Attack vector: ssrf
Category: vulnerability-disclosure
Severity: Critical
CVE: CVE-2026-44694
CWE: CWE-367
CWE-918
CVSS: 9.1 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L)

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability 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. This issue has been patched in version 2.50.2.


Mitigations:

Architectural layers (MAESTRO):