critical9.5
CVE-2026-104849
Tinypool is a minimal Node.js worker thread pool implementation.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | tinypool | < 2.1.2 | 2.1.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-85c8-ppgw-ccpr
- https://github.com/tinylibs/tinypool/security/advisories/GHSA-85c8-ppgw-ccpr
- https://nvd.nist.gov/vuln/detail/CVE-2026-104849
- https://github.com/tinylibs/tinypool/pull/135
- https://github.com/tinylibs/tinypool/commit/f41411a3e23324c674f35a19a3240f7a7c40ffbf
- https://github.com/tinylibs/tinypool/releases/tag/v2.1.2