Nest: Unbounded memory growth in the NestJS TCP microservice transport

Summary A peer that can open a TCP connection to a NestJS microservice using the built-in TCP transport can make the server process allocate memory without limit, on either side of the connection, until the process is killed by the OS or by its container memory limit. No authentication, no...

CVE-2026-40879 Nest: DoS via Recursive handleData in JsonSocket (TCP Transport)

Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.19, when an attacker sends many small, valid JSON messages in one TCP frame, handleData recurses once per message; the buffer shrinks each call. maxBufferSize is never reached; call stack overflows instead. ...

CVE-2026-40879 Nest: DoS via Recursive handleData in JsonSocket (TCP Transport)

Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.19, when an attacker sends many small, valid JSON messages in one TCP frame, handleData recurses once per message; the buffer shrinks each call. maxBufferSize is never reached; call stack overflows instead. ...

CVE-2026-40879 Nest: DoS via Recursive handleData in JsonSocket (TCP Transport)

Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.19, when an attacker sends many small, valid JSON messages in one TCP frame, handleData recurses once per message; the buffer shrinks each call. maxBufferSize is never reached; call stack overflows instead. ...