CVE-2026-44694CWE-367CWE-918

n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths

High · published May 8, 2026

CVSS v4.0
7.2
EPSS
0%
Percentile
22.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.2 · HIGH
Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L
EPSS
0.00309 · 22.5th percentile
Weaknesses
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition; CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-05-08T19:12Z
EPSS history
Timeline
  • 08 MAY 19:12Z
    n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths
    cvelistv5