Lovable.dev Security Checklist: 10 Things to Fix Before Going Live

Lovable Apps Ship Fast — Vulnerabilities Ship Faster

Lovable.dev is incredible for getting from idea to working app in hours.

But the speed that makes it powerful also means security checks often get skipped.

These are the 10 most critical security fixes for any Lovable app before launch.

✅ 1. Enable RLS on Every Supabase Table

Lovable creates tables via the dashboard. By default, RLS is disabled.

Check: In Supabase → Table Editor → verify "Row Level Security" is ON for every table. Minimum policy:

CREATE POLICY "Users can only see their own data"
ON public.your_table
FOR ALL
USING (auth.uid() = user_id);

✅ 2. Rotate Your Supabase Anon Key

The anon key in your Lovable app is exposed to every user's browser — that's expected and fine,

as long as your RLS policies are correct. But if you've been testing with relaxed policies,

rotate the key before going live.

✅ 3. Verify No Service Role Key in Client Code

Check: View source on your deployed app. Search for anything starting with eyJ that's longer than 100 characters — that's a JWT-formatted Supabase service role key.

curl -s https://yourapp.lovable.app | grep -o 'eyJ[A-Za-z0-9_-]*'

✅ 4. Set Up Rate Limiting on Auth

Lovable's default Supabase auth has no rate limiting on sign-up/login. Enable it in:

Supabase Dashboard → Authentication → Rate Limits → set Sign-in attempt limits.

✅ 5. Review Storage Bucket Access

Supabase Storage buckets default to private — but Lovable sometimes creates public buckets for profile images.

Check: Any bucket marked "Public" is accessible by anyone with the file path. Fix: Move user-uploaded files to private buckets and use signed URLs.

✅ 6. Add Input Validation to All Forms

Lovable's AI doesn't always add client-side validation. More importantly: always validate on the server side (Supabase functions/RPC).

Use a schema library like Zod for any data that touches your database.

✅ 7. Check CORS Configuration

If you embedded a Lovable backend in a custom domain, verify your Edge Functions have proper CORS:

// Edge Function
return new Response(data, {
  headers: {
    'Access-Control-Allow-Origin': 'https://yourapp.com', // NOT '*'
    'Access-Control-Allow-Credentials': 'true',
  }
});

✅ 8. Disable Supabase Realtime on Sensitive Tables

Lovable sometimes enables realtime subscriptions on all tables for easier updates.

Realtime respects RLS policies, but double-check in:

Supabase → Database → Replication — disable realtime for tables containing sensitive data.

✅ 9. Set Up Auth Email Templates

Lovable's default Supabase auth emails use Supabase branding. Update them in:

Supabase → Authentication → Email Templates.

More importantly: configure a custom SMTP provider so emails don't land in spam.

✅ 10. Run a Security Scan Before Announcing

Before you post on LinkedIn, Product Hunt, or Reddit:

Go to securisky.dev/scan/public

Enter your Lovable app URL

Review the findings

The free scan checks SSL, exposed secrets, security headers, and CORS settings.

Sign up for the full 18-surface scan that catches Supabase RLS bypasses, JS bundle key leaks, and subdomain takeovers.

After Launch

Security isn't one-and-done. Set up automated weekly scans to catch regressions

as your app grows and features get added.