CVE-2026-44007
vm2: nesting: true bypasses require: false, allowing sandbox escape to arbitrary OS command execution
CRITICAL 9.9EPSS 0.6%
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.
- Affected
- patriksimek · vm2
- CVSS v3.1 CNA
- 9.9 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - CVSS v3.1 GITHUB
- 9.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H - EPSS
- 0.61% chance of exploitation in the next 30 days, 48th percentile
- Published
- 2026-05-13
- Updated
- 2026-09-07
Proof-of-concept exploits (1)
Security advisories
- patriksimek/vm2/security/advisories/GHSA-8hg8-63c5-gwmx
- http://www.openwall.com/lists/oss-security/2026/05/05/11