Federated Sub-graph Injection: The "Blind" GraphQL Data Leak
IT InstaTunnel Team Published by our engineering team Federated Sub-graph Injection: The “Blind” GraphQL Data Leak As enterprises aggressively migrate from monolithic architectures to Federated GraphQL (Supergraphs), a new and critical vulnerability class has emerged: Federated Sub-graph Injection . While organizations fortify their API Gateways, they often neglect the soft underbelly of the architecture — the sub-graphs themselves. This vulnerability exploits the implicit trust between the Gateway and its sub-graphs, allowing attackers to “stitch” together sensitive data fragments from private microservices that were never intended to be joined. This article explores the mechanics of the attack, why it is invisible to traditional WAFs, and how to implement a Zero Trust architecture for your Data Graph. The Rise of the Supergraph (and the Security Gap) In the modern API landscape, GraphQL Federation — popularized by Apollo Federation, Hasura, and WunderGraph — has become th...