VULNERABILITY INTELLIGENCE

CVE-2026-44005

CVSS score10 CRITICAL
EPSS probability0.83%
CISA KEVNot currently listed
Published2026-05-13
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H

Description

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.

Weakness classification

  • CWE-94: Improper Control of Generation of Code ('Code Injection')
  • CWE-653: Improper Isolation or Compartmentalization
  • CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Primary references