mcp-chat

The application demonstrates good security practices including Auth.js for authentication (with Drizzle Adapter and password hashing), Drizzle ORM for database interactions (parameterized queries), Zod for file upload validation, and server-only enforcement for sensitive operations. Authorization checks are present in API routes to ensure user ownership of chats and documents. Datadog RUM is configured to mask user input by default. However, there are notable concerns: 1. Client-side Python code execution via Pyodide: LLM-generated code running in the browser introduces a significant risk. While prompts attempt to restrict network/file access, an imperfect sandbox or LLM output deviation could lead to client-side exploits. 2. Google OAuth `allowDangerousEmailAccountLinking: true`: This setting can lead to account hijacking if not accompanied by robust email verification by NextAuth, which may not be the default behavior of the Drizzle adapter. 3. Debug logging in production: The `/api/chat` endpoint logs `fullSession` details under a 'DEBUG' flag. If exposed, this could leak sensitive session data. 4. `ignoreBuildErrors: true` in `next.config.ts`: This can mask critical type errors that might introduce runtime vulnerabilities or unexpected behavior. 5. Reliance on MCP Server: The security and integrity of the external MCP server are critical; compromise of this service could impact the chat application's security.