CVE-2026-44001: vm2: Sandbox Escape via Promise Constructor Unhandled Rejection (Process Crash DoS)

Description

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, a sandbox escape vulnerability in vm2 v3.10.5 allows any sandboxed code to crash the host Node.js process via a single Promise constructor that triggers an unhandled rejection propagating to the host. The fix for CVE-2026-22709 (v3.10.2) only sanitized the onRejected callback in .then() and .catch() overrides and did not address the executor-to-unhandledRejection path. This vulnerability is fixed in 3.11.0.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Changed

Exploitation

Is it being used?

Exploit prediction (EPSS)0.4% · higher than 39% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

VM

vm2 · patriksimek

< 3.11.0 · source: vendor, NVD

RH

Red Hat Ansible Automation Platform 2.1 · Red Hat

All versions, or not specified · source: CISA