To secure a Lovable + Supabase stack, you need to: (1) verify RLS policies match your security requirements, (2) test auth flows handle all edge cases including loading states, (3) configure environment variables correctly for deployment, and (4) ensure protected routes check authentication before rendering. This blueprint covers both Lovable and Supabase security tasks with platform-specific guidance.
TL;DR
Lovable generates polished React apps with Supabase integration, but security configuration needs review. Key issues: RLS policies may be too permissive or missing, authentication flows may not handle all edge cases, and environment variables need proper configuration for deployment. Always verify RLS policies and test auth flows before going live.
Lovable Security Considerations
| What Lovable Does Well | What Needs Review |
|---|---|
| Generates beautiful UI | RLS policy completeness |
| Sets up Supabase client | Auth edge case handling |
| Creates auth flows | Session persistence |
| Scaffolds data operations | Authorization checks |
Part 1: Supabase Verify RLS Configuration
-- Run in Supabase SQL Editor
SELECT tablename, rowsecurity
FROM pg_tables
WHERE schemaname = 'public';
-- Enable RLS on any table showing 'false'
ALTER TABLE your_table ENABLE ROW LEVEL SECURITY;
-- User data isolation
CREATE POLICY "Users can only access own data"
ON user_data FOR ALL
USING (auth.uid() = user_id);
-- Public read, authenticated write
CREATE POLICY "Public read access"
ON posts FOR SELECT
USING (true);
CREATE POLICY "Authenticated users can create"
ON posts FOR INSERT
WITH CHECK (auth.uid() = author_id);
Part 2: Lovable Authentication Flow Review
import { useEffect, useState } from 'react';
import { supabase } from '@/lib/supabase';
export function useAuth() {
const [user, setUser] = useState(null);
const [loading, setLoading] = useState(true);
useEffect(() => {
// Get initial session
supabase.auth.getSession().then(({ data: { session } }) => {
setUser(session?.user ?? null);
setLoading(false);
});
// Listen for changes
const { data: { subscription } } = supabase.auth.onAuthStateChange(
(_event, session) => {
setUser(session?.user ?? null);
}
);
return () => subscription.unsubscribe();
}, []);
return { user, loading };
}
Check Lovable's implementation: Ensure the auth hook handles initial session loading and subscribes to auth state changes properly.
Part 3: Supabase Environment Variables
# Public (safe for client)
VITE_SUPABASE_URL=https://xxx.supabase.co
VITE_SUPABASE_ANON_KEY=eyJ...
# Private (server-side only, if applicable)
SUPABASE_SERVICE_ROLE_KEY=eyJ...
Security Checklist
Pre-Launch Checklist for Lovable + Supabase
RLS enabled on all tables
RLS policies restrict access properly
Auth state handling includes loading state
Protected routes check auth before render
Environment variables configured for deployment
Auth redirect URLs include production domain
No service role key in client code
Does Lovable configure RLS automatically?
Lovable may suggest or generate RLS policies, but always verify they match your security requirements. Test with different user scenarios to ensure proper isolation.
How do I deploy a Lovable + Supabase app?
Export your project and deploy to Vercel, Netlify, or similar. Configure environment variables in your hosting platform's dashboard, not in code.
Alternative Stack Options
Consider these related blueprints for different stack combinations:
- Lovable + Firebase - Alternative backend with Firestore
- Bolt + Supabase - Same backend, different AI tool
- Lovable + Vercel - Deployment platform guide