CVE-2026-102281: Nest: Remote process termination via a deeply nested microservice message pattern

A single message whose pattern is a deeply nested object terminates a NestJS microservice that uses the TCP or RabbitMQ transport. The server serialized the client-supplied pattern with JSON.stringify to derive the handler lookup key; on deeply nested input this throws RangeError: Maximum call stack size exceeded. The exception escaped the asynchronous message handler as an unhandled promise rejection, which terminates the Node.js process under the default --unhandled-rejections=throw.