Why API Security Is No Longer an AppSec Problem – And What Security Leaders Must Do Instead

This article contends that API security has outgrown traditional AppSec and shift-left-only approaches because modern attacks abuse business logic and authorization at runtime using legitimate traffic (e.g., BOLA, credential stuffing, low-and-slow exfiltration). It advocates a cross-functional, runtime-first model that derives API visibility from live traffic, prioritizes protection by business impact, treats automation as the default attacker, and aligns ownership across AppSec, platform security, and leadership—an approach exemplified by Wallarm’s capabilities.