CVE-2026-5536 FedML-AI FedML gRPC server grpc_server.py sendMessage deserialization

A weakness has been identified in FedML-AI FedML up to 0.8.9. Affected is the function sendMessage of the file grpcserver.py of the component gRPC server. Executing a manipulation can lead to deserialization. The attack may be performed from remote. The vendor was contacted early about this...