5-Minute Supabase RLS Audit: Is Your Vibe-Coded App Leaking Data?

Researchers found critical Row Level Security flaws in 10.3% of AI-generated apps in March 2026. Run these 3 SQL queries in your Supabase dashboard right now to check if your vibe-coded project is vulnerable.

Prerequisites

You need a Supabase project and access to the Supabase SQL Editor. No advanced database knowledge required.

What You'll Learn

How to run a 5-minute Supabase RLS audit, what the most common RLS misconfigurations look like, and how to fix them with a single SQL command.

Step 1: Find tables with RLS disabled

Open your Supabase dashboard → SQL Editor → New Query. Run:

SELECT schemaname, tablename, rowsecurity
FROM pg_tables
WHERE schemaname = 'public'
AND rowsecurity = false;

If any tables appear, enable RLS immediately:

ALTER TABLE your_table_name ENABLE ROW LEVEL SECURITY;

Step 2: Check for permissive policies

SELECT tablename, policyname, cmd, qual
FROM pg_policies
WHERE schemaname = 'public';

Look for qual = 'true' — this means any authenticated user can access all rows. Replace with:

CREATE POLICY "user_owns_data" ON your_table
  FOR ALL USING (auth.uid() = user_id);

Step 3: Test with a second account

Sign up a second test user. Use the Supabase Table Editor or your app's API while logged in as User B. Try accessing User A's rows. If you can read them, your policy is broken.

Step 4: Never expose your service_role key

Check your client-side code and .env files. The service_role key bypasses ALL RLS. It should never appear in browser JavaScript. Use anon key for client-side operations.

Common Challenges

The most common mistake is enabling RLS on a table but forgetting to add any policies — this blocks ALL access, not just unauthorized access. Always add at least one policy after enabling RLS.

Another gotcha: AI tools may generate USING (true) as a placeholder policy. This is the same as having no security.

Advanced Tips

For multi-tenant apps, use organization or team IDs in your policies:

CREATE POLICY "org_member_access" ON project_data
  FOR ALL USING (
    auth.uid() IN (
      SELECT user_id FROM org_members
      WHERE org_id = project_data.org_id
    )
  );

For deeper reading, see Vibe Coding Ebook Chapter 19 (Security Playbook) and Chapter 10 (The Dark Side) for the full incident registry.

Also check CyberOS for pattern CYBEROS-2026-615 (React Server Component Missing Request Size Bounds) — the companion pattern to RLS vulnerabilities in full-stack vibe apps.

Conclusion

10% of vibe-coded apps have critical security flaws. A 5-minute audit could be the difference between a safe launch and a data breach. Run the queries, fix what you find, and make security part of your vibe coding workflow — not an afterthought.

For more security deep-dives, visit cyberos.dev and subscribe to the EndOfCoding newsletter for weekly AI security updates.