The application immune system of my dreams

Application security testing is the process of identifying and validating vulnerabilities in software before they can be exploited. Modern approaches go beyond pattern-based scanning by analyzing application logic, verifying that findings are real through proof, and reducing false positives so security teams can focus on confirmed risk.

Enterprises invest heavily in application security, yet most only deeply test a small fraction of their software portfolio. The rest remains largely unexamined. This article argues that Coverage Ratio — how much of your attack surface is tested, how often, and how deeply — is the most overlooked metric in AppSec. It proposes a simple model for measuring coverage and explains why improving it is critical to reducing real-world risk.