GraphQL Injection

Summary

GraphQL Injection is a type of application attack where malicious actors exploit vulnerabilities in GraphQL APIs by injecting crafted queries or mutations to manipulate the backend, access unauthorized data, or cause denial of service.

Key Characteristics

• Targets GraphQL endpoints by injecting malicious query parameters or mutations.
• Can lead to unauthorized data exposure, data modification, or service disruption.
• Exploits improper input validation and insufficient access controls in GraphQL resolvers.
• May bypass traditional REST API security measures due to GraphQL’s flexible query structure.
• Often combined with other attack techniques such as authentication bypass or privilege escalation.

Defensive Controls

• Implement strict input validation and sanitization for all GraphQL queries and variables.
• Enforce robust authentication and authorization checks within resolvers.
• Use query complexity analysis and depth limiting to prevent resource exhaustion attacks.
• Employ schema whitelisting to restrict allowed queries and mutations.
• Monitor and log GraphQL API activity for suspicious patterns and anomalies.

Related Security Solutions

GraphQL security can be enhanced using Web Application Firewalls (WAFs) with GraphQL-specific rules, API gateways with built-in query validation, runtime application self-protection (RASP) tools, and specialized GraphQL security testing tools to identify injection vulnerabilities.