CVE-2026-104849: Tinypool is a minimal Node.js worker thread pool implementation. Prior to 2.1.2, Tinypool reads filename from a caller-supplied options object in…

PriorityP352critical9.5CVSS 4.0

AVNACLATPPRNUINVCHVIHVAHSCHSIHSAHEXCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX

EPSS

0.39%

30.8th percentile

Tinypool is a minimal Node.js worker thread pool implementation. Prior to 2.1.2, Tinypool reads filename from a caller-supplied options object in pool.run(task, options) without requiring an own property, so a polluted Object.prototype.filename can replace the intended worker module. Applications are affected only when they pass their own second-argument options object to pool.run(); calls without that argument use the trusted default options object. An attacker who can first pollute the prototype can cause the worker pool to load attacker-selected JavaScript and can read or modify task data with the host process's privileges. This issue is fixed in version 2.1.2.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
tinylibs	tinypool	< 2.1.2	2.1.2
tinylibs	tinypool	>= 0 < 2.1.2	2.1.2

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