CVE-2026-43997

Critical

Open

TLP:CLEAR

vm2: Sandbox Escape

NVD CVE.org

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Description

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, it is possible to obtain the host Object. There are various ways to use the host Object, to escape the sandbox, one example would be using HostObject.getOwnPropertySymbols to obtain Symbol(nodejs.util.inspect.custom). This vulnerability is fixed in 3.11.0.

Details

CVSS Score: 10.0
EPSS Score ⓘ: 0.98%

59th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Confidence: 90%
Published: May 13, 2026
Last Modified: Aug 6, 2026

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