Supabase RLS Checker: Prevent Data Leaks

Use this Supabase RLS checklist to verify policies, lock down service-role access, and keep tenant data isolated.

RLS checklist

  • Enable RLS on every user-facing table before shipping.
  • Write explicit `SELECT`, `INSERT`, `UPDATE`, and `DELETE` policies per table.
  • Use `auth.uid()` checks to constrain access by account or workspace.
  • Avoid service-role keys in browser code or public runtime variables.
  • Test policy behavior with both authenticated and anonymous sessions.

High-risk pattern

The most common failure is forgetting RLS on one new table while everything else is protected. One unguarded table can expose private records across tenants.

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Related: Next.js Security Checklist and Rate Limiting Checklist.