A Supabase security audit checks whether your app leaks data between users. The usual culprit is Row Level Security being disabled or misconfigured while the public anon key ships in the browser — so anyone can read your tables directly. A senior engineer reviews your RLS policies, auth, storage rules, and exposed keys, then fixes what's broken in code you own.
Supabase Security Audit
Is Your App Leaking Data?
If you never explicitly wrote Row Level Security policies for every table, your data is probably readable by anyone with your public key — which is everyone. We find out for certain, and we fix it. Free 30-minute review to start.
The one gap that exposes most Supabase apps
Supabase talks to your database directly from the browser. That is the whole point — it is fast to build with. But it means the only thing standing between a user and everyone's data is Row Level Security (RLS).
When an app is built quickly — especially with AI tools like Lovable, Bolt, Cursor, or v0 — RLS is routinely left off, because the app works fine without it in the demo. There is no error. Nothing looks wrong. But the public anon key that ships in your frontend can now query every table and read every row: other users' profiles, messages, payments, uploads.
A demo hides this completely. Real users, or anyone who opens the browser dev tools, do not. According to Veracode's 2025 GenAI Code Security Report, 45% of AI-generated code contains security vulnerabilities — and on a Supabase app, a missing policy is not a theoretical flaw, it is an open door.
The Audit
What a Supabase security audit checks
We go through every path an attacker — or a curious user — could take to reach data they shouldn't. Each area is rated and explained in plain English.
Row Level Security (RLS)
Whether RLS is enabled on every table — and whether the policies actually isolate one user's data from another, or just look like they do.
Exposed keys & secrets
Whether your service_role key, database URL, or other secrets have leaked into the browser bundle or client code.
Storage bucket access
Whether uploaded files are readable by the wrong people — a common gap where private documents end up publicly reachable.
Auth & session handling
How logins, tokens, and sessions are handled — and whether an expired or forged session can still reach protected data.
Database functions & views
SECURITY DEFINER functions and views that quietly bypass RLS and hand back data a user should never see.
Data isolation, end to end
The real test: can user A ever read, edit, or delete user B's data through any path in your app?
We build production Supabase apps — so we know where they break
This is not a scanner reading a checklist. It is a senior engineer who ships Supabase apps with full Row Level Security, storage policies, and auth in production — and has rebuilt an entire permission system for an AI-built app whose data was wide open. We know the gaps because we close them for a living.
Supabase Security Audit — FAQ
Find out if your data is actually safe
A free 30-minute review tells you whether you have a real exposure — before a user, an investor, or an attacker finds it first.
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