Hardening Next.js Applications for Enterprise Integrity

#Bulletproof App Router Configurations#link

Next.js provides native protection layers. However, dynamic routing, Client Component environments leaking secrets, and loose CORS headers can introduce significant holes. Let's harden the middleware headers configuration.

// next.config.ts hardened headers
const headers = [
  {
    key: 'Content-Security-Policy',
    value: "default-src 'self'; script-src 'self' 'unsafe-eval' 'unsafe-inline';"
  },
  {
    key: 'X-Content-Type-Options',
    value: 'nosniff'
  }
];