Agentic SAST vs runtime testing: are your controls keeping up?

TL;DR: Deepsec improves codebase scanning by using coding agents to trace security-sensitive paths and rank findings, but MindFort’s review says it remains a static analyzer that cannot prove exploitability in live authentication, business logic, or infrastructure flows, according to MindFort. The practical lesson is that agentic review can widen coverage, but runtime validation still decides whether a finding is real.

NHIMG editorial — based on content published by MindFort: How Good Is Deepsec for Cybersecurity?

Questions worth separating out

Q: How should security teams use agentic static analysis without over-trusting it?

A: Use it to widen coverage and surface plausible weaknesses faster, but do not treat the output as proof of risk.

Q: Why do identity and access flaws often require runtime testing?

A: Because the control that matters is enforced in the live application, not in the source tree.

Q: What do security teams get wrong about review loops in AI-assisted development?

A: Teams often assume a review loop automatically means control is preserved.

Practitioner guidance

• Implement runtime confirmation for high-risk findings Require every severe finding that affects authentication, authorization, session handling, or business logic to be validated against the live application before remediation priority is set.
• Separate candidate detection from exploit proof Use agentic static analysis to generate candidates, then route them into a distinct runtime validation step so severity reflects observed behaviour rather than code suspicion alone.
• Prioritise identity-sensitive attack paths first Focus validation effort on access controls, token handling, delegated permissions, and cross-service workflows because those are the paths most likely to hide in source but fail in production.

What's in the full article

MindFort's full analysis covers the operational detail this post intentionally leaves for the source:

• How the harness dispatches coding agents across candidate files and revalidates findings before ticket export
• The practical differences between agentic SAST output and runtime exploit validation in deployed applications
• Why its local and CI execution model matters for teams that do not want source code exposed to a third-party SaaS
• The comparison points practitioners should use when deciding where static review ends and runtime testing begins

👉 Read MindFort's analysis of Deepsec's agentic code review and runtime limits →

Agentic SAST vs runtime testing: are your controls keeping up?

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