Security scanning for Next.js apps

Codanopy detects a Next.js app under its JavaScript/Node stack — from package.json, lockfiles, and .js/.jsx/.ts/.tsx source. What matters for security review is the server/client boundary Next.js introduces: data passed from server to client is serialized and sent to the browser, and every server action or route handler is a public endpoint that needs its own checks.

Detected as: JavaScript / Node. Codanopy detects and scans at the language level, so Next.js projects get full dependency, secret, and pattern coverage; the notes below name patterns specific to how Next.js apps tend to be structured, not a separate Next.js-aware analyzer.

What to watch for in Next.js

• A Server Component passing a full database record or token as props to a Client Component, which serializes it into the RSC payload the browser receives
• Server Actions or Route Handlers with no authentication check inside them — they are reachable by direct POST regardless of what the UI shows
• A proxy.ts (middleware.ts before Next.js 16) matcher that doesn't cover every route a Server Action or Route Handler lives under — leaving it with no auth check at all
• Server Actions returning raw database rows to the client instead of only the fields the UI renders

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