From the course: Learning the OWASP Top 10 (2025 Version)
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Defending against mishandling of exceptional conditions
From the course: Learning the OWASP Top 10 (2025 Version)
Defending against mishandling of exceptional conditions
When we talk about defending against mishandling of exceptional conditions, the focus isn't on preventing errors from happening. Errors are unavoidable. Systems are complex, dependencies fail, and users behave in unexpected ways. The real security question is what happens next. How an application responds under stress is often more important than how it behaves when everything works perfectly. A strong defense begins with consistent defensive exception handling. Error paths should never be treated as secondary or temporary code. They need the same level of care as primary business logic. Unhandled exceptions can crash services, expose internal details, or leave systems in partially completed states. Defensive handling means assuming errors will occur and designing clear, predictable responses. Exceptions should be caught intentionally, processed in a controlled way, and routed through the same authentication and authorization checks that apply during normal operation. If a request…
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