I Built an Open-Source Rust Proxy to Help Prevent Cross-Tenant Data Leaks in PostgreSQL

Tags: "#postgres" "#rust" "#opensource" "#security"

Building a multi-tenant SaaS application comes with a security challenge that doesn't always get enough attention:

What happens when one tenant accidentally gains access to another tenant's data?

In many SaaS applications, multiple customers share the same PostgreSQL database.

Developers rely on application-level authorization, tenant filters, and sometimes PostgreSQL Row-Level Security (RLS) to keep customer data isolated.

These approaches can work well.…