This eBook explains why dynamic application security testing (DAST) remains a critical component of modern application security programs despite the rise of shift-left practices. It highlights that while SAST and SCA help identify vulnerabilities earlier in development, they cannot fully assess real-world risk because security issues often emerge only when applications are running in production. DAST addresses this gap by simulating real attacks in deployed environments, uncovering vulnerabilities such as misconfigurations, authentication flaws, and runtime issues. The guide emphasizes a defense-in-depth approach, where DAST complements other testing methods to provide a complete security picture and ensure organizations understand and mitigate actual exploitable risks.

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