CVE-2026-44007

CRITICAL

vm2: nesting: true bypasses require: false, allowing sandbox escape to arbitrary OS command execution

Title source: cna

Description

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.1, when a NodeVM is created with nesting: true, sandbox code can unconditionally require('vm2') regardless of the outer VM's require configuration — including require: false. With access to vm2, the sandbox constructs a new inner NodeVM with its own unrestricted require settings and executes arbitrary OS commands on the host. Any application that runs untrusted code inside a NodeVM with nesting: true is fully compromised. This vulnerability is fixed in 3.11.1.

References (5)

Core 5

Core References

Vendor Advisory

https://access.redhat.com/security/cve/CVE-2026-44007

Vendor Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2477198

Vendor Advisory

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44007.json

X_Refsource_Confirm x_refsource_confirm

https://github.com/patriksimek/vm2/security/advisories/GHSA-8hg8-63c5-gwmx

Mailing List

http://www.openwall.com/lists/oss-security/2026/05/05/11

Scores

CVSS v3 9.1

EPSS 0.0090

EPSS Percentile 55.5%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-1100 CWE-284

Status published

Products (3)

npm/vm2 0 - 3.11.1npm

patriksimek/vm2 < 3.11.1

vm2_project/vm2 < 3.11.1

Published May 13, 2026

Tracked Since May 13, 2026