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...

Nest: Remote process termination via a deeply nested microservice message pattern

| Field | Value | | --- | --- | | Ecosystem | npm | | Package | @nestjs/microservices | | Affected versions | = 12.0.0, 12.0.2 and 11.2.4 | | Patched versions | 12.0.2 and 11.2.4 upgrade to 12.0.3 / 11.2.5 | Summary A single message whose pattern is a deeply nested object terminates a NestJS...

Uncaught Exception

Overview @nestjs/microservices is a Nest - modern, fast, powerful node.js web framework @microservices Affected versions of this package are vulnerable to Uncaught Exception via unguarded JSON.stringify calls on client-controlled message patterns in the TCP and RMQ server handlers...

Uncontrolled Recursion

@nestjs/microservices is vulnerable to Uncontrolled Recursion. The vulnerability is due to recursive processing of multiple JSON messages in a single TCP frame without proper recursion limits, which allows an attacker to trigger a stack overflow and crash the application...

@artur-abliazimov/othentic-cli (1.16.6), @darraghor/nest-backend-libs (>=3.8.8, <=5.0.11) +21 more potentially affected by CVE-2026-40879 via @nestjs/microservices (>=11.0.1, <=11.1.18)

@nestjs/microservices NPM version =11.0.1, =3.8.8, =11.0.36, =1.0.0, =1.0.11, =1.0.23, =1.0.1, =1.0.1, =11.0.0, =0.7.0, =1.0.4, =1.0.36, =1.1.0, =1.0.0, =1.9.1, =1.16.9 and more Source cves: CVE-2026-40879 Source advisory: OSV:GHSA-HPWF-8G29-85QM...

@artur-abliazimov/othentic-cli (1.16.6), @darraghor/nest-backend-libs (>=3.8.8, <=5.0.11) +21 more potentially affected by CVE-2026-40879 via @nestjs/microservices (>=11.0.1, <=11.1.18)

@nestjs/microservices NPM version =11.0.1, =3.8.8, =11.0.36, =1.0.0, =1.0.11, =1.0.23, =1.0.1, =1.0.1, =11.0.0, =0.7.0, =1.0.4, =1.0.36, =1.1.0, =1.0.0, =1.9.1, =1.16.9 and more Source cves: CVE-2026-40879 Source advisory: SNYK:JS-NESTJSMICROSERVICES-16082546...

Uncontrolled Recursion

Overview @nestjs/microservices is a Nest - modern, fast, powerful node.js web framework @microservices Affected versions of this package are vulnerable to Uncontrolled Recursion through the handleData function in packages/microservices/helpers/json-socket.ts. An attacker can crash the TCP...