Data Validation Security Pattern

Ensures all incoming data is validated against specifications before processing, preventing injection attacks, data corruption, and unexpected behavior.

When to Use

Use this pattern when:

• Processing ANY input from external sources (users, APIs, databases)
• Preventing injection attacks (SQLi, XSS, Command Injection)
• Implementing API request validation checklists
• Ensuring data integrity for business logic
• Handling file uploads or complex data structures

Problem Addressed

Entity provides unexpected data: Malicious or malformed input causes: