Supabase Security Scanner
Using Supabase? Make sure your Row Level Security is properly configured. We test your actual database to find exposed tables.
Our automated security scanner analyzes your Supabase application for vulnerabilities, misconfigurations, and exposed secrets. Get a comprehensive security report in minutes, not days.
Most Supabase Security Issues: Missing RLS
The majority of Supabase security incidents stem from tables without Row Level Security enabled. When RLS is disabled, anyone with your anon key can read, modify, or delete all data in that table.
Supabase Security Considerations
Supabase makes development fast, but AI-generated code often skips security best practices:
- !Tables without Row Level Security enabled
- !RLS policies that are too permissive
- !Service role key exposed in client code
- !RPC functions callable without authentication
Where Security Breaks in Supabase Apps
Built on Supabase (Postgres + RLS), Supabase applications share a recognizable fingerprint — which means attackers and automated scanners find them the same way every time. Based on real vulnerability patterns in Supabase deployments, the breakdown is 2 critical-impact issues, 2 high-impact, and 1 medium-or-lower.
Real-world observation
This is the #1 vulnerability in Supabase apps, affecting majority of vibe-coded projects.
Tables Without RLS
Any table without RLS enabled is fully exposed via the public API.
Fix: ALTER TABLE name ENABLE ROW LEVEL SECURITY; on every table.
Service Role Key Exposure
The service_role key bypasses all RLS and grants admin access.
Fix: Never use service_role in frontend. Keep it server-side only. Rotate if exposed.
Permissive RLS Policies
Policies that allow more access than intended (e.g., any authenticated user).
Fix: Use (select auth.uid()) = user_id pattern. Test policies with different contexts.
Unprotected RPC Functions
Database functions callable without authentication.
Fix: Add auth.uid() IS NOT NULL checks at the start of all functions.
Storage Bucket Exposure
Storage buckets without policies allow public read/write.
Fix: Configure storage policies to require authentication and ownership.
What We Check
RLS Policies
Tests your Row Level Security by attempting to read/write data as anonymous and authenticated users.
Service Key Exposure
Scans for service_role keys that should never be in client-side code.
RPC Functions
Tests your database functions for proper authentication requirements.
Auth Configuration
Checks authentication settings for weak passwords, missing verification, and rate limiting.
What You'll Get
Why Supabase Apps Need Security Scanning
Supabase provides a powerful PostgreSQL database with built-in authentication and real-time subscriptions. However, its security model relies on Row Level Security (RLS) policies that you must configure explicitly for each table.
By design, Supabase exposes your project URL and anon key in client-side code. This is intentional and secure IF you have proper RLS policies. Without RLS, anyone with these public credentials can access your entire database.
VAS actively tests your Supabase configuration by querying your tables with the anon key. We identify which tables are exposed, which RLS policies are missing or misconfigured, and provide the exact SQL to fix each issue.
How Supabase Security Scanning Works
Submit Your URL
Enter your Supabase application URL. Our scanner automatically detects your tech stack and configures the appropriate security checks for Supabase.
Automated Analysis
We scan for exposed secrets, security headers, authentication issues, database misconfigurations, and Supabase-specific vulnerabilities. The scan typically completes in 15-20 minutes.
Get Actionable Results
Receive a detailed report with prioritized vulnerabilities, severity ratings, and step-by-step remediation guidance with code examples specific to Supabase.
Common Questions About Supabase Security
What vulnerabilities are most common in Supabase apps?
The top finding classes in Supabase apps: tables without rls; service role key exposure; permissive rls policies. Of those, tables without rls is the most frequent critical-impact issue — it typically exposes the full dataset in a single query.
Has any Supabase app actually been breached?
Yes. The majority of Supabase security incidents stem from tables without Row Level Security enabled. When RLS is disabled, anyone with your anon key can read, modify, or delete all data in that table. This was a configuration issue in apps built with Supabase, not a flaw in the platform itself — which is why a security scan catches the same pattern before it causes a breach.
What does a VAS scan of a Supabase app check?
The scan probes your deployed app for the specific findings above: rls policies, service key exposure, rpc functions, auth configuration. It actually attempts each vulnerability class (not just header inspection) and reports results with severity + fix for each.
Is running a scan safe for production?
Yes. The scanner uses read-only probes against public endpoints — no data modification, no destructive tests. Scans typically finish in 15–20 minutes and will not impact application availability.
Remediation Playbook for Supabase
Priority-ordered fixes for the specific findings we see in Supabase apps. Critical items close data-exposure gaps; high items prevent compromise; medium items reduce attack surface. Applies to apps using Supabase (Postgres + RLS) — the dominant Supabase stack.
1. Tables Without RLS
Why it matters: Any table without RLS enabled is fully exposed via the public API.
How to close it: ALTER TABLE name ENABLE ROW LEVEL SECURITY; on every table.
2. Service Role Key Exposure
Why it matters: The service_role key bypasses all RLS and grants admin access.
How to close it: Never use service_role in frontend. Keep it server-side only. Rotate if exposed.
3. Permissive RLS Policies
Why it matters: Policies that allow more access than intended (e.g., any authenticated user).
How to close it: Use (select auth.uid()) = user_id pattern. Test policies with different contexts.
4. Unprotected RPC Functions
Why it matters: Database functions callable without authentication.
How to close it: Add auth.uid() IS NOT NULL checks at the start of all functions.
5. Storage Bucket Exposure
Why it matters: Storage buckets without policies allow public read/write.
How to close it: Configure storage policies to require authentication and ownership.
Verify the fixes stuck
Run a VAS scan after applying each fix to confirm the gap is actually closed. "I applied the fix" is not evidence — the fix may have been partial, reverted, or not deployed. Re-scanning gives you proof, and a record for compliance if you ever need it.
Secure Your Supabase App
Don't let vulnerabilities compromise your hard work. Security issues in Supabase applications can lead to data breaches, unauthorized access, and damaged user trust. The average data breach costs startups between $120,000 and $1.24 million.
Run a Starter Scan in minutes — just $9. Scan before you launch and deploy with confidence knowing your application meets security best practices.
Get Starter ScanMore on Supabase Security
Every angle of Supabase security — from the specific findings we detect to step-by-step fixes.
Supabase Security Risks
Specific risks we find in Supabase apps, with real-world examples.
Supabase Security Issues
Issues grouped by severity with detection and fix steps.
Supabase Best Practices
Remediation playbook derived from Supabase's actual failure modes.
Is Supabase Safe?
Honest assessment of Supabase's production readiness.
Supabase Security Checklist
Pre-launch checklist covering every finding class for Supabase.
How to Secure Supabase Apps
Step-by-step hardening guide for Supabase deployments.
Can Supabase Apps Be Hacked?
Attack vectors specific to Supabase and how they get exploited.