Vulnerability · Published May 8, 2026 · Assigned by GitHub_M
CVE-2026-44694n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths
High 7.2
In plain English
A high-severity server-side request forgery in n8n-mcp from czlonkowski. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | n8n-mcp | 2.50.2 | GHSA-cmrh-wvq6-wm9r |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| czlonkowski | n8n-mcp | >= 2.18.7, < 2.50.2 |
Weakness: CWE-367, CWE-918 · 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