Module 25 · GraphQL Pentesting — Introspection, Authz, Query Abuse

Manish Garg
Manish Garg Associate of (ISC)² · RingSafe
May 14, 2026
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Why this module exists. GraphQL endpoints have become standard in modern APIs, and their pentesting differs from REST. Introspection, query depth, batched queries, and authorization complexities create attack surface invisible in REST-centric mental models. This module covers the GraphQL-specific attack patterns.

Why GraphQL needs different testing

GraphQL provides a single endpoint that responds to flexible query shapes. The implications:

  • Introspection lets the attacker enumerate the entire schema with a single query.
  • Each field can have its own authorization; missing authz on a single field exposes data.
  • Query depth and breadth can be weaponised for resource exhaustion.
  • Batched queries expose multiple operations to single-rate-limit application.
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