CVE-2026-44005

[CVE catalog]

A flaw was found in vm2 3.9.6 through 3.10.5. The VM bridge exposes mutable proxies for host intrinsic prototypes and forwards sandbox writes via otherReflectSet/otherReflectDefineProperty, allowing mutation of host Object.prototype, Array.prototype, and Function.prototype from inside the sandbox. Fixed in 3.11.0. vm2: vm2: Sandbox Escape leading to Arbitrary Code Execution vm2 is vulnerable to sandbox escape via host prototype mutation through the VM bridge reflection handlers. A remote unauthenticated attacker who can run code in a default VM or NodeVM may modify shared host JavaScript prototypes and achieve arbitrary code execution. Fixed in vm2 3.11.0. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Severity

Critical · CVSS 10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H

Published

May 3, 2026, 10:00:00 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.83% · Oct 27, 2026

{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "vm2",
      "ecosystem": "cpe",
      "fixed_version": "3.11.0"
    },
    {
      "name": "vm2",
      "ranges": [
        {
          "fixed": "3.11.0",
          "introduced": "3.9.6",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "3.11.0",
      "provider_record_id": "NVD-CVE-2026-44005"
    }
  ]
}