Disclosure summary
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.
Source-reported weakness categories
CWE-94, CWE-1321
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
GitHub Reviewed Security Advisories · GHSA-85c8-ppgw-ccpr
Open original source · Updated Oct 05, 2026
Tinypool: Prototype Pollution Gadget to RCE in run() options
Source severity: CRITICAL / 9.5
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| npm | tinypool | < 2.1.2 | 2.1.2 |
NIST National Vulnerability Database · NVD-CVE-2026-104849
Open original source · Updated Oct 02, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
Original records & references
PUBLISHED 2026-10-02T13:17:03-04:00
MODIFIED 2026-10-02T14:33:20-04:00
INGESTED 2026-10-06T11:45:30-04:00