Improper access control in vm2 - CVE-2026-44005
Published: May 4, 2026
Vulnerability identifier: #VU129584
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-44005
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to escape the sandbox and modify host objects.
The vulnerability exists due to improper access control in the vm2 bridge when processing attacker-controlled JavaScript in a default VM or inherited NodeVM. A remote attacker can mutate shared host intrinsic prototypes to escape the sandbox and modify host objects.
The issue involves mutable proxies to host-realm intrinsic prototypes, including Object.prototype, Array.prototype, and Function.prototype.
Affected software
vm2
How to mitigate CVE-2026-44005
Install security update from vendor's website.
vm2 - update to 3.11.0