CVE-2026-45707

n8n-MCP vulnerability CVE-2026-45707 affects HTTP-mode multi-tenant deployments. Before v2.51.2, when ENABLE_MULTI_TENANT=true, per-request target n8n instance is chosen via x-n8n-url/x-n8n-key headers; omitting or partially omitting these headers caused requests to fall back to the operator’s pr...

CVE-2026-45707 n8n-MCP: Multi-tenant MCP requests fall back to process-level n8n credentials when tenant headers are absent or incomplete

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.2, when ENABLEMULTITENANT=true, the HTTP transport documents that the target n8n instance is selected per-request from x-n8n-url / x-n8n-key headers. Requests that...

CVE-2026-39974

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 AUTHTOKEN to cause the server to iss...

CVE-2026-39974

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 AUTHTOKEN to cause the server to iss...

CVE-2026-39974

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 AUTHTOKEN to cause the server to iss...

GHSA-4GGG-H7PH-26QR n8n-mcp has authenticated SSRF via instance-URL header in multi-tenant HTTP mode

Impact An authenticated Server-Side Request Forgery in n8n-mcp allows a caller holding a valid AUTHTOKEN 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 conten...

n8n-mcp has authenticated SSRF via instance-URL header in multi-tenant HTTP mode

Impact An authenticated Server-Side Request Forgery in n8n-mcp allows a caller holding a valid AUTHTOKEN 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 conten...

PT-2026-31662

Impact 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...