Supabase Security Guide
Q&ASupabase
What are the most common Supabase security mistakes?
The most common mistake is leaving RLS disabled on tables, which exposes all data to anyone with the anon key. Other frequent issues include exposing the service_role key in client-side code, writing RLS policies that are too permissive such as using true for the USING clause, and forgetting to secure storage buckets. Developers also commonly expose database function results that bypass RLS by using SECURITY DEFINER without proper input validation. UNPWNED detects all of these misconfigurations and provides specific guidance on how to fix each issue.
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Run free security scanLast reviewed: 2026-04-07. Based on publicly available security research and UNPWNED scan telemetry.
More Supabase Security Questions
What is Row Level Security (RLS) in Supabase and why does it matter?Is Supabase secure by default?How do I check if RLS is enabled on my Supabase tables?Can Supabase data be accessed without authentication?What is the difference between the Supabase service_role key and the anon key?How do I secure Supabase Storage buckets?