Row Level Security
A database security mechanism that enforces access policies at the row level, ensuring that users can only access and manipulate data records belonging to themselves. It is commonly used to achieve data isolation in multi-tenant SaaS applications.
Timeline (last 90 days)
In Supabase, if a table has RLS enabled but no policies, clients have no access by default.
Row Level Security (RLS) is Postgres's native row-level access control mechanism; each table can have policies bound to it, using SQL expressions to determine whether the current request identity is allowed to read or write a given row.
It is recommended to set up PostgreSQL Row Level Security (RLS) at the database layer as the last line of defense for multi-tenant data isolation; filtering only in the frontend or a single query layer means that a single omission can lead to cross-tenant data leakage.
A common approach to multi-tenant isolation is to make organization_id a foreign key column on every business table and uniformly inject the filter condition in the data access layer, for example using Prisma middleware or Drizzle RLS policies.
In RLS, the USING check determines which existing rows a user can access, while WITH CHECK validates rows being inserted or updated, and both are indispensable
Once RLS is enabled on a table, all access requests that do not match any policy are denied by default
Some researchers recommend that platforms make 'enable RLS by default for new tables' a mandatory option rather than an optional prompt, to eliminate configuration oversights at the root.
Row-Level Security (RLS) is an access control mechanism provided by PostgreSQL, upon which Supabase is directly built.
RLS is off by default; if it is not explicitly enabled and policies are not written after a table is created, the table is fully open to all roles with database connection privileges.
Supabase tables without RLS enabled can be accessed anonymously through the public API.
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All Facts (15)
Supabase通过Row Level Security（行级安全策略）机制在数据库层面控制用户数据权限
90%UnverifiedSupabase's anon key is by design publicly embedded in front-end code and does not itself constitute a security risk, provided that RLS policies are correctly configured.
60%UnverifiedIn Supabase, if a table has RLS enabled but no policies, clients have no access by default.
50%UnverifiedRow Level Security (RLS) is Postgres's native row-level access control mechanism; each table can have policies bound to it, using SQL expressions to determine whether the current request identity is allowed to read or write a given row.
50%UnverifiedIt is recommended to set up PostgreSQL Row Level Security (RLS) at the database layer as the last line of defense for multi-tenant data isolation; filtering only in the frontend or a single query layer means that a single omission can lead to cross-tenant data leakage.
50%UnverifiedA common approach to multi-tenant isolation is to make organization_id a foreign key column on every business table and uniformly inject the filter condition in the data access layer, for example using Prisma middleware or Drizzle RLS policies.
50%UnverifiedIn RLS, the USING check determines which existing rows a user can access, while WITH CHECK validates rows being inserted or updated, and both are indispensable
50%UnverifiedOnce RLS is enabled on a table, all access requests that do not match any policy are denied by default
50%UnverifiedSome researchers recommend that platforms make 'enable RLS by default for new tables' a mandatory option rather than an optional prompt, to eliminate configuration oversights at the root.
50%UnverifiedRow-Level Security (RLS) is an access control mechanism provided by PostgreSQL, upon which Supabase is directly built.
50%UnverifiedRLS is off by default; if it is not explicitly enabled and policies are not written after a table is created, the table is fully open to all roles with database connection privileges.
50%UnverifiedSupabase tables without RLS enabled can be accessed anonymously through the public API.
50%UnverifiedAI-generated code often skips the step of enabling RLS when rapidly generating table creation statements, or produces settings that appear functional but are actually insecure.
50%UnverifiedDevelopers should ensure that RLS is enabled on all tables involving sensitive data, avoid exposing high-privilege keys on the client side, perform security testing on public API endpoints before going live, and conduct manual security reviews of AI-generated code.
50%UnverifiedPostgreSQL has natively supported row-level security (RLS) since version 9.5.
50%