Topic starter
19/08/2026 3:26 pm
TL;DR: APIs now account for 17% of published vulnerabilities and 43% of newly added CISA Known Exploited Vulnerabilities are API-related, according to Escape’s analysis, which argues that SAST, DAST, AI pentesting, and manual testing each catch different classes of misuse. The core issue is governance, not tooling volume: teams need layered testing that follows API change speed, not perimeter-era assumptions.
Editorial analysis by NHI Mgmt Group, based on content published by Escape: “Types of API security testing: a guide for enterprise teams”.
By the numbers:
- In 2025, APIs accounted for 17% of all published security vulnerabilities.
- 43% of newly added CISA Known Exploited Vulnerabilities were API-related.
- API-related incidents cost organizations up to 20% more than conventional data breaches.
Key questions
Q: What breaks when API security testing stops at build time?
A: You miss stateful flaws that only appear when real users, roles, and request sequences interact with the live service.
Q: Why do APIs create so much risk when authentication looks correct?
A: Because a valid identity is not the same thing as a safe one.
Q: What are the signs that API security controls are missing business logic abuse?
A: Common signs include unusual sequences of requests, repeated probing of endpoints, low traffic attacks that still change data or behaviour, and API activity that looks valid at the request level but abnormal in context.
Practitioner guidance
- Map API ownership and inventory Create a current inventory of documented, partner, and shadow endpoints, then assign a business owner and a security owner to each one.
- Test object-level authorisation explicitly Add test cases that change object IDs, cross tenant boundaries, and replay legitimate tokens against adjacent records to prove BOLA resistance.
- Layer SAST and DAST into every release path Run static checks at commit time and dynamic checks against deployed APIs in staging so runtime misconfigurations and workflow abuse do not escape review.
Bottom line: API security testing fails when teams rely on one method to cover code quality, runtime behaviour, and adversarial misuse at the same time.
Explore further
View Full Forum → | NHI Foundation Course → | Our Services → | Read the full analysis →
19/08/2026 4:10 pm
API testing gaps are an authorisation governance problem, not a scanner problem. The article shows that teams can still miss broken object level authorization, shadow APIs, and business logic abuse even when they have multiple tools in place. The real failure is assuming endpoint coverage equals control coverage. Practitioners should treat API testing as an authorisation assurance programme, not a vulnerability-finding exercise.
A few things that frame the scale:
- Secrets management is a top five cybersecurity priority for only 33% of organisations, behind cloud security (45%), API security (42%), and endpoint security (36%), according to the 2024 State of Secrets Management Survey.
- 71% of organizations use third-party APIs, according to Gartner’s 2024 data.
A question worth separating out:
Q: How should security teams prioritise SAST, DAST, and manual API testing?
A: Use SAST to catch insecure code and dependency issues early, use DAST to verify live authentication and authorisation behaviour, and use manual or AI-led testing for chained abuse and high-value workflows. The priority is not one tool over the others. It is sequencing them so each release gets coverage at build time, runtime, and adversarial review where needed.
👉 Read our full editorial: API security testing gaps leave business logic flaws exposed