Server Development / GraphQL
Security
A closer look at Security.
Securing GraphQL APIs
A single /graphql endpoint concentrates power and risk. This overview maps GraphQL-specific threats—introspection, deep queries, alias abuse, CSRF, and verbose errors—to controls you should layer at the gateway and in resolvers.
Authentication and authorization in GraphQL
GraphQL needs identity in context and authorization at field granularity. This chapter covers transport auth, resolver and field guards, NestJS GqlExecutionContext, node(id) IDOR risks, and subscription connection_init.
Limiting query depth and cost
Depth limits, complexity analysis, alias caps, timeouts, persisted query allowlists, and disabling introspection protect GraphQL from expensive operations. This chapter shows NestJS complexity plugins and gateway-level controls.