nextjs-server-action-validation

To validate Next.js Server Actions, enforce a strict order: authenticate the session first, parse inputs with Zod safeParse, and verify org-scoped authorization before any database access. This prevents untrusted user input from reaching your database writes.

The correct order for Next.js Server Actions is to run authentication checks first, followed by Zod schema validation via safeParse, and then apply multi-tenant org-scoping checks before executing any database queries or mutations.

Secure multi-tenant authorization in Next.js Server Actions requires comparing the session orgId against the input orgId after validation. All database writes must route through an orgQuery-based scoping layer to enforce tenant isolation safely.

No, this validation approach excludes route handlers, Server Component data fetching, and Stripe webhook handling. It specifically targets mutation workflows where client-submitted form data or action parameters are processed via public POST-style endpoints.

Using safeParse for Zod validation in Server Actions returns structured errors gracefully without throwing exceptions. This controlled error surface prevents leaking stack traces or sensitive query details back to the client when invalid data is submitted.

Prevent unauthorized database access in Next.js Server Actions by authenticating the user session and validating inputs with Zod before calling the database. Route all subsequent writes through an orgQuery helper to enforce strict tenant scoping.