Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/tinylibs/tinypool/commit/f41411a3e23324c674f35a19a3240f7a7c40
- https://github.com/tinylibs/tinypool/pull/135
- https://github.com/tinylibs/tinypool/releases/tag/v2.1.2
- https://github.com/tinylibs/tinypool/security/advisories/GHSA-85c8-ppgw-ccpr
FAQ
What is CVE-2026-104849?
CVE-2026-104849 is a documented vulnerability. 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 prope...
How severe is CVE-2026-104849?
CVSS scoring is not yet available for CVE-2026-104849. Check NVD for updates.
Is there a patch for CVE-2026-104849?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.