CVE-2026-44694

CRITICAL

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

Title source: cna
STIX 2.1

Description

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.

References (3)

Core 3

Scores

CVSS v3 9.1
EPSS 0.0001
EPSS Percentile 3.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-367 CWE-918
Status published
Products (3)
czlonkowski/n8n-mcp >= 2.18.7, < 2.50.2
n8n-mcp/n8n-mcp 2.18.7 - 2.50.2
npm/n8n-mcp 2.18.7 - 2.50.2npm
Published May 08, 2026
Tracked Since May 09, 2026