multi-tenant-guard

To enforce tenant isolation in a shared-database multi-tenant application, you apply org_id filtering to all queries, updates, and deletes, and use a ContextVar to preserve per-tenant scope across async tasks. This prevents cross-tenant data leakage.

ContextVar propagation for multi-tenant request scoping works by preserving the TenantContext across async tasks and background work. It defines a per-request scope containing org_id, user_id, roles, and permissions to ensure data access stays within the correct tenant.

Extracting tenant context from incoming request headers involves parsing the headers to build a TenantContext for downstream components. This context includes the org_id and user permissions needed to scope all subsequent data access correctly.

The best way to audit multi-tenant data access for cross-tenant leakage is to use an audit checklist and isolation-test templates. These validate that org_id filtering is correctly enforced across all queries, updates, and deletes to ensure compliance.

Yes, you can use this tenant isolation approach for async background tasks. It uses ContextVar-based scope to maintain the TenantContext across asynchronous operations, ensuring that background work remains scoped to the correct org_id.

You need an audit checklist for multi-tenant applications to systematically validate tenant isolation and prevent compliance risks. It verifies that context propagation and per-tenant query patterns correctly enforce org_id filtering across the shared database.