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02/08/2026 11:50 am
TL;DR: Business logic flaws, broken authentication, and authorization bypasses in application source code are found by Gecko Security, while IaC tools such as Terrascan and Checkov inspect Terraform, CloudFormation, and Kubernetes configs for misconfigurations and compliance violations, according to Gecko Security. The real risk is category confusion: security teams need the right control for the layer they are actually governing, not a keyword match.
NHIMG editorial — based on content published by Gecko Security: IaC scanning tools are not the same as application security testing
Questions worth separating out
Q: How should security teams choose between IaC scanning and application security testing?
A: Choose IaC scanning when the risk lives in infrastructure configuration, such as exposed storage, missing encryption, or permissive network access.
Q: Why do IaC scanners miss application authorization failures?
A: IaC scanners evaluate declarative infrastructure states, not the request handling logic that decides whether a user or service is allowed to act.
Q: What do security teams get wrong when they treat IaC and app security as the same thing?
A: They assume one category of tooling can validate every layer of access risk.
Practitioner guidance
- Separate infrastructure policy checks from application authorization tests Build one pipeline for IaC misconfiguration detection and a separate one for source-code analysis of broken access control, authentication bypasses, and privilege escalation paths.
- Map each tool to the layer it actually governs Document whether a control applies to Terraform, CloudFormation, Kubernetes manifests, or application source code.
- Review identity enforcement points in code Identify endpoints, service methods, and workflow steps where the application makes access decisions, then test those paths directly for missing checks, IDOR, and privilege escalation chains.
What's in the full article
Gecko Security's full article covers the operational detail this post intentionally leaves for the source:
- Side-by-side comparisons of Terrascan, Checkov, Wiz, and Gecko by scan surface and intended use.
- Concrete examples of IaC misconfigurations versus source-code logic flaws, useful when briefing developers or procurement.
- Keyword and positioning guidance for teams deciding whether to target IaC, SAST, or business logic search intent.
- A plain-English explanation of why application security testing belongs in a different category from infrastructure scanning.
👉 Read Gecko Security's analysis of IaC scanning tools versus application security testing →
IaC scanning tools vs application security testing: where the line sits?
Explore further
02/08/2026 12:59 pm
Category confusion is the real control failure here. IaC scanners and application security testing are both valid controls, but they operate on different layers of the stack. When teams treat them as interchangeable, they end up with clean infrastructure files and unresolved application authorization defects. The governance lesson is simple: align the control to the decision point, especially where identity and access are enforced in code.
A question worth separating out:
Q: When should organisations add application security testing if they already use IaC scanners?
A: Add application security testing as soon as the application itself makes access decisions that matter to the business. If a user, token, or service account can reach sensitive actions through code paths, those paths need direct testing. IaC coverage should be treated as complementary, not a substitute for code-level assurance.
👉 Read our full editorial: IaC scanning tools are not the same as application security testing
