api-security

To secure Next.js API routes with Firebase ID token verification, you enforce token checks in middleware to protect sensitive endpoints. This prevents unauthorized access by validating user identity before processing requests.

The best way to validate inputs in Next.js serverless APIs is applying Zod-based input schemas. This enforces strict data validation to prevent malformed data and security issues before reaching your backend logic.

You apply rate limiting and CORS to harden Next.js API endpoints by configuring middleware within your serverless environment. This restricts excessive requests and controls cross-origin access to prevent data leakage.

Yes, you can use Zod validation and enforce admin roles on Firebase backends. This combination verifies Firebase ID tokens and validates inputs to protect sensitive endpoints like order processing from unauthorized access.

Your Next.js API route leaks data when auth tokens are not consistently enforced due to misconfigurations in token handling. Implementing safe error handling and environment-based credential management prevents this data leakage.