CVE-2026-102992

The record

piscina is a node.js worker pool implementation. Prior to 4.9.4, 5.3.2, and 6.0.0-rc.5, Piscina stores ThreadPool.options in src/index.ts as a plain object that inherits from Object.prototype. Applications with a separate prototype-pollution primitive can therefore supply inherited values for security-sensitive options that do not have own defaults. An inherited execArgv value is passed to the Node.js Worker constructor and can preload attacker-controlled code in worker threads, an inherited loadBalancer function can execute during task scheduling, and inherited env values can alter worker environments. This issue is fixed in versions 4.9.4, 5.3.2, and 6.0.0-rc.5.

Affected packages

Related vulnerabilities

• CVE-2026-104852 GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. CWE-1321
• CVE-2026-104849 Tinypool is a minimal Node.js worker thread pool implementation. CWE-1321
• CVE-2026-104848 Tinypool is a minimal Node.js worker thread pool implementation. CWE-1321
• CVE-2026-104183 stream-json is a micro-library of stream components for processing JSON and JSONC with a… CWE-1321
• CVE-2026-101908 Axios is a promise-based HTTP client for the browser and Node.js. CWE-1321
• CVE-2026-101909 Axios is a promise-based HTTP client for the browser and Node.js. CWE-1321
• CVE-2026-101902 Axios is a promise-based HTTP client for the browser and Node.js. CWE-1321
• CVE-2026-101904 Axios is a promise-based HTTP client for the browser and Node.js. CWE-1321