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OWASP Cheat Sheet Series · 1 min read

Error Handling Cheat Sheet

OWASP guidance on centralized handling of unexpected failures, generic client-facing responses and server-side diagnostic records that do not reveal implementation details to clients.

Open the reference Implementation GuideReviewed 2026-10-02

How to use this reference

Define separate public-error and internal-diagnostic contracts, then review ordinary failure handling in owned application code. Keep logging controls separate from response formatting.

Before reading

  • Basic HTTP response semantics
  • Server-side exception handling

Context and limits

  • Living guidance; framework examples should be checked against the application’s supported runtime version.
  • This resource concerns response disclosure; it does not by itself prove that authorization is preserved in privileged fallback paths.

Related visual models

A failure reaches a shared error handler. The public response contains minimal generic information. A separate diagnostic path selects useful context, removes secrets and unnecessary personal data, and stores it under access and retention controls. Raw exception details do not flow directly to the client.

Conceptual model Diagram

Failures need separate public and diagnostic contracts

Editorial conceptual model derived from the Facebook error-response case and OWASP error-handling and logging guidance. The case establishes unintended response disclosure and broader framework remediation; diagnostic…

Reviewed 2026-10-03Read

Sources and provenance

  1. Error Handling Cheat Sheet OWASP Cheat Sheet Series · reviewed 2026-10-02

Record reviewed 2026-10-02. Snapshot 53796974ace8. Open the complete JSON contract.

GitHub snapshot 2026-10-04

53796974ace8 · JSON exports & schemas · CC BY 4.0 content / MIT software