GHSA-WG4G-395P-MQV3 n8n-MCP: Sensitive MCP tool-call arguments logged on authenticated requests in HTTP mode

Impact When n8n-mcp runs in HTTP transport mode, authenticated MCP tools/call requests had their full arguments and JSON-RPC params written to server logs by the request dispatcher and several sibling code paths before any redaction. When a tool call carries credential material — most notably...

n8n-MCP: Sensitive MCP tool-call arguments logged on authenticated requests in HTTP mode

Impact When n8n-mcp runs in HTTP transport mode, authenticated MCP tools/call requests had their full arguments and JSON-RPC params written to server logs by the request dispatcher and several sibling code paths before any redaction. When a tool call carries credential material — most notably...

CVE-2026-39974 n8n-MCP has an Authenticated SSRF via instance-URL header in multi-tenant HTTP mode

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

CVE-2026-39974 affects the n8n-mcp component (Model Context Protocol server). In multi-tenant HTTP mode, an authenticated caller with a valid AUTH_TOKEN can trigger SSRF to arbitrary URLs supplied via per-request headers (instance-URL headers). The server reflects HTTP responses back through JSON...

CVE-2025-59155

hackmd-mcp is a Model Context Protocol server for integrating HackMD's note-taking platform with AI assistants. From 1.4.0 to before 1.5.0, hackmd-mcp contains a server-side request forgery SSRF vulnerability when the server is run in HTTP transport mode. Arbitrary hackmdApiUrl values supplied vi...