GraphQL server implementations differ from each other. The strength of your choice of GraphQL server depends on those who maintain it. Attackers knows that. It is easy enough for an abuser to fingerprint your running implementing and work against it.
Stay ahead of abuser ways to leverage GraphQL free-form nature to attack different phase in an operation journey from parser, resolver toc business logic.
Ensure the right security knobs are in place to protect against query-based DoS attacks. Enforce tens to GraphQL controls to maintain operability.
GraphQL’s complex payload expands attackers' ability to inject malicious payloads and compromise its underlying system.
Properly validate and sanitize any user-supplied input in a GraphQL API to prevent injection attacks.