Introduction In any application or system, we must have safeguards in place to prevent cross-customer data exposure. Our software is developed using a range of approaches, from human-written code to AI-assisted generation and regardless of how code is produced, the risk of unintended data exposure remains a critical concern. Developers, Engineering Managers, and Security teams should be aware of potential data exposures and the additional controls which can be put in place as preventive measures. Once data is exposed or lost, it cannot be undone. Consequently, a data breach may result in serious impacts, including financial loss and reputational harm. Background Ensuring data security is a fundamental requirement for applications, both internal and externally exposed. A traditional three-tier architecture is composed of a presentation layer (web tier), an application layer (application tier), and a database layer (database tier).…