Dev.to
7/13/2026
Fixing Supabase 'permission denied' errors when deploying AI-built apps
Original: Your AI-built app works in the builder but breaks on deploy with a Supabase "permission denied" error. Here is why, and how to fix it.
Short summary
AI app builders like Lovable, Bolt, v0, and Cursor often generate apps that work in preview but fail on deploy with Supabase 'permission denied' errors. The root cause is that Row Level Security is enabled but production requests arrive without the user's authenticated session. The fix involves using request-scoped server clients that read auth cookies, refreshing sessions in middleware, and adding production domains to Supabase Auth redirect URLs.
- •AI builders leave the security boundary between app and database half-finished
- •RLS correctly blocks anonymous production requests that worked in preview with elevated access
- •Fix by using authenticated server-side clients and proper auth redirect URLs — never disable RLS
Generated with AI, which can make mistakes.
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