Topic starter
02/08/2026 9:41 am
TL;DR: BOLA, weak token handling, enumeration, and injection remain exposed in REST APIs, with StackHawk finding predictable URLs and stateless request flows make authorization and validation failures easier to exploit. REST APIs need consistent request-level enforcement across validation, ownership checks, logging, and gateway policy before production exposure.
Editorial analysis by NHI Mgmt Group, based on content published by StackHawk: “REST API Security: Best Practices Guide”.
By the numbers:
- Broken Object Level Authorization remains the #1 API security risk, according to the OWASP API Security Top 10.
Key questions
Q: Why do predictable REST API paths increase breach risk?
A: Predictable paths make enumeration and resource discovery easier, especially when IDs are sequential or error handling reveals whether a resource exists.
Q: How do security teams know if API authorisation is actually working?
A: They should test whether each identity can only complete the specific actions it is supposed to perform, then compare that result with runtime logs and anomaly patterns.
Q: What breaks when REST APIs rely on authentication without object-level authorisation?
A: Authentication proves who made the call, but not whether that caller should access the specific object requested.
Practitioner guidance
- Enforce object-level authorization in code Require every read, update, and delete path to verify object ownership or entitlement against the authenticated identity before the database query executes.
- Validate every request field, not just bodies Apply allowlists and format checks to query parameters, path parameters, headers, and request bodies so crafted inputs cannot alter business logic or filters.
- Centralise edge policy at the API gateway Use gateway controls for token validation, rate limiting, request rejection, and logging so policy is consistent across services instead of reimplemented in each app.
Bottom line: REST APIs remain vulnerable when teams treat authentication as enough and leave object-level authorization to chance.
Glossary terms: Broken Object-Level Authorization, Input Validation, API Gateway Policy Enforcement, Request-level Authorization
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This topic was modified 3 days ago by NHI Mgmt Group
02/08/2026 12:35 pm
REST API security is now an access-control problem, not just an application-testing problem. The article shows that predictable endpoints, stateless requests, and object identifiers turn ordinary API traffic into a control-enforcement challenge. When the API becomes the real decision point for who can read or change data, IAM teams have to treat authorisation logic as part of identity governance, not as an afterthought in application code. Practitioners should therefore measure where request-level policy is actually enforced, not where it is assumed.
A few things that frame the scale:
- 71% of organizations use third-party APIs, according to Gartner’s 2024 data.
A question worth separating out:
Q: Should API gateway controls replace application-level authorization checks?
A: No. Gateway controls are useful for centralising token validation, throttling, and logging, but they cannot reliably prove that a user may access a specific object in a specific business context. Application-level checks remain necessary for ownership, scope, and action-level authorisation, especially in REST APIs that expose individual resources.
👉 Read our full editorial: REST API security gaps persist as authorization and input checks fail