CVE-2026-44005: VM2 Project VM2

Critical severity, CVSS 10.0. EPSS: 0.8% chance of exploitation in the next 30 days.

vm2 is an open source vm/sandbox for Node.js. From 3.9.6 to 3.10.5, vm2's bridge exposes mutable proxies for real host-realm intrinsic prototypes and then forwards sandbox writes into the underlying host objects with otherReflectSet() and otherReflectDefineProperty(), which lets attacker-controlled JavaScript running in a default VM or inherited NodeVM mutate shared host Object.prototype, Array.prototype, and Function.prototype from inside the sandbox This vulnerability is fixed in 3.11.0.

Affected products

• VM2 Project VM2: from 3.9.6, before 3.11.0 (fixed in 3.11.0)

Published 2026-05-13. Last modified 2026-09-07.