SAST, DAST and SCA: are your controls keeping up?

TL;DR: SAST, DAST and SCA each cover different application security blind spots, but none validates exploitability, multi-step attack paths or broken access control in live environments, according to Ethiack research. That gap makes continuous adversarial validation the control that turns findings into defensible risk decisions.

Editorial analysis by NHI Mgmt Group, based on content published by Ethiack: “SAST vs DAST vs SCA: The Comparison for CISOs and AppSec Leads”.

Key questions

Q: What breaks when SAST, DAST and SCA are used without exploitability validation?

A: Teams get a long list of findings, but they still do not know which issues an attacker can actually reach or chain in production.

Q: Why do SAST and DAST still miss broken object-level authorisation?

A: Because BOLA depends on whether a caller is entitled to a specific object at a specific moment, not just whether code looks unsafe or a live request succeeds.

Q: What are the signs that an AppSec programme is failing despite high scan coverage?

A: A growing backlog, long mean time to remediation, frequent reassignment, and repeated dismissals all indicate the programme is detecting issues faster than teams can close them.

Practitioner guidance

• Separate detection from validation Use SAST, DAST and SCA to generate findings, then require a validation step before remediation priority is finalised.
• Prioritise findings by reachability Rank issues that can be reached from a real entry point above findings that exist only as theoretical code or dependency exposure.
• Add access-control validation outside the scanner loop Test authorisation paths and business-logic workflows with adversarial techniques instead of assuming scanner coverage proves access control is sound.

Bottom line: SAST, DAST and SCA each contribute useful coverage, but together they still leave exploitable gaps around live behaviour, attack chaining and access control.

Explore further

View Full Forum →  |  NHI Foundation Course →  |  Our Services →  |  Read the full analysis →