CVE-2026-44694: n8n-Mcp

Critical severity, CVSS 9.1. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• n8n-Mcp n8n-Mcp: from 2.18.7, before 2.50.2 (fixed in 2.50.2)

Published 2026-05-08. Last modified 2026-06-17.