PREQUEL-2025-0083
GraphQL schema validation failuresMediumImpact: 7/10Mitigation: 5/10
Description
GraphQL validation errors occur when client requests fail to comply with the GraphQL schema.\nThese errors typically happen during query parsing and validation phases, before execution begins.\nCommon validation failures include unknown types, missing required arguments, incorrect field usage,\nor invalid input values. These errors prevent the operation from executing and return error messages\nthat describe the validation problems to the client.\n
Mitigation
- Implement schema versioning strategies to prevent breaking changes\n- Use schema validation tools during development to catch issues before production\n- Add monitoring for GraphQL validation error rates with alerts on sudden increases\n- Ensure proper error handling in client applications to gracefully handle validation failures\n- Implement CI/CD checks that validate GraphQL operations against the current schema\n- Document required fields and types clearly in API documentation and schema introspection\n- For federation: ensure consistent types across subgraphs and proper composition testing\n- Consider implementing a development proxy that warns about deprecated field usage\n- Roll back recent schema changes if they cause a spike in validation errors\n