# GraphQL Security Review and Abuse Patterns

![GraphQL Abuse and Control Map](/files/CbZ7uDQljgXjNvSTHIm3)

> **Intro:** GraphQL compresses a great deal of power into one endpoint. This changes how discovery, authorization, and abuse resistance should be reviewed.
>
> **What this page includes**
>
> * a practical GraphQL review model
> * where GraphQL differs from REST in security terms
> * authorization and abuse patterns that commonly fail
> * current defensive controls for production systems

## What to review first

### Schema discoverability

Ask whether introspection is enabled in production, whether internal or admin-only fields are visible in the public schema, and whether schema docs leak workflow assumptions.

### Resolver authorization

The most common failure is assuming top-level authorization is sufficient. Verify top-level query and mutation access, object-level checks in nested resolvers, field-level exposure, and tenant filtering that survives complex query shapes.

### Operation cost and abuse resistance

Review whether the service implements:

* depth limits;
* complexity or cost scoring;
* pagination and list-size enforcement;
* timeouts and resolver budgets;
* rate limits for expensive actor/object combinations.

## Common failure modes

* path-based API review without resolver-by-resolver authorization;
* hidden UI fields that remain queryable;
* large nested queries or alias abuse exhausting resources;
* batching that turns one request into many expensive operations;
* admin or debug resolvers left in production schema.

## Logging and detection

Capture more than status code and latency. Useful signals include operation name, caller, depth/complexity characteristics, expensive resolver paths, and authorization denials.

## Review checklist

* [ ] production schema discoverability decision documented
* [ ] resolver-level and object-level authorization tested
* [ ] field-level sensitive data review completed
* [ ] depth, complexity, pagination, and timeout controls enabled
* [ ] query logging and anomaly review available for operators

## Related pages

* [API Design and Contract Security](/architecture-api-crypto-and-identity/index/api-design-and-contract-security.md)
* [API Authentication and Authorization](/architecture-api-crypto-and-identity/index/api-authentication-and-authorization.md)
* [API Abuse Resilience and Rate Limits](/architecture-api-crypto-and-identity/index/api-abuse-resilience-and-rate-limits.md)
* [API Testing, Observability, and Release Gates](/architecture-api-crypto-and-identity/index/api-testing-observability-and-release-gates.md)

***

*Author attribution: Ivan Piskunov, 2026 - Educational and defensive-engineering use.*


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