2026-04-13

Shipping Secure Defaults With Next.js And FastAPI

Security defaults that reduce accidental exposure across frontend and API boundaries.

nextjsfastapihardening

Frontend Defaults

Keep API credentials server-side and proxy only what the client needs. Avoid leaking internal host details in errors.

Maintain explicit CSP and route-aware robots/sitemap metadata so crawl behavior aligns with product intent.

Health endpoints should expose minimal public data and reserve diagnostics for authenticated callers.

Regex and parser logic must be bounded to avoid algorithmic complexity attacks in high-throughput paths.

Pair build checks with integration tests that validate both security posture and customer-visible UX.

Treat changelogs and docs as part of the release artifact so operators can reason about behavior changes quickly.