Description
n8n-MCP is a Model Context Protocol (MCP) server that provides AI assistants with comprehensive access to n8n node documentation, properties, and operations. Prior to 2.47.4, an authenticated Server-Side Request Forgery in n8n-mcp allows a caller holding a valid AUTH_TOKEN to cause the server to issue HTTP requests to arbitrary URLs supplied through multi-tenant HTTP headers. Response bodies are reflected back through JSON-RPC, so an attacker can read the contents of any URL the server can reach — including cloud instance metadata endpoints (AWS IMDS, GCP, Azure, Alibaba, Oracle), internal network services, and any other host the server process has network access to. The primary at-risk deployments are multi-tenant HTTP installations where more than one operator can present a valid AUTH_TOKEN, or where a token is shared with less-trusted clients. Single-tenant stdio deployments and HTTP deployments without multi-tenant headers are not affected. This vulnerability is fixed in 2.47.4.
INFO
Published Date :
2026-04-09T16:45:20.490Z
Last Modified :
2026-04-09T16:45:20.490Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-39974 vulnerability.
| Vendors | Products |
|---|---|
| Czlonkowski |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-39974.
