v0 generates beautiful UI components, but when you connect them to Supabase, you need to ensure data fetching is secure and RLS is configured.
v0's React components pair naturally with Supabase's client library. Developers often generate UI with v0 and add Supabase for the backend.
These are the security issues we find most often in v0 apps using Supabase.
Generated components may fetch data without proper authorization checks.
Tables queried by v0 components need RLS but often don't have it.
Components may display data that should be filtered server-side.
Generated forms may submit directly to Supabase without proper validation.
Analyze how components fetch and display data from Supabase.
Test all connected tables for proper RLS configuration.
Check form submissions for validation and authorization.
Identify data filtering that should happen at the database level.
Apply these fixes right now to improve your security.
Add RLS policies to all tables queried by v0 componentsUse Supabase's auth helpers with generated componentsAdd server-side validation for form submissionsFilter data in RLS policies, not just in component codeTest components as different users to verify access controlv0 + Supabase is a modern stack, but connecting generated components to your database requires security consideration. RLS is essential.
Find Row Level Security misconfigurations, exposed credentials, and other vulnerabilities before attackers do.
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