CVE-2026-104848

CVE-2026-104848 · Tinypool: Prototype Pollution gadget in worker options leads to Remote Code Execution

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Tinypool is a minimal Node.js worker thread pool implementation. Prior to 2.1.1, Tinypool constructs ThreadPool.options from a normal options object and reads the execArgv and env worker options in dist/index.js, allowing values inherited from a polluted Object.prototype to be copied into own properties and passed to worker_threads.Worker. An attacker who can first pollute either property can cause each newly spawned worker to load attacker-selected JavaScript through command-line preload arguments or NODE_OPTIONS, resulting in code execution with the host process's privileges and possible access to CI secrets, signing material, or build artifacts. This issue is fixed in version 2.1.1.

CVSS 9.5 · Critical · EPSS 0.5% · Fix available

Published

2026-10-02T16:15:04.101Z

Updated

2026-10-02T17:29:40.500Z

Stack: node

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