Improperly Controlled Modification of Dynamically-Determined Object Attributes Affecting org.webjars.npm:vm2 package, versions [0,]
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- published1 Jun 2026
- disclosed29 May 2026
- creditq1uf3ngONEKEY
Introduced: 29 May 2026
NewCVE-2026-47209 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
org.webjars.npm:vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules.
Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes via the BaseHandler.set trap in lib/bridge.js. An attacker can mutate host-realm objects or install attacker-controlled hooks by writing through an inherited object or a forged Reflect.set receiver, causing sandbox-supplied values to be written to the wrapped host object instead of the intended receiver. This lets sandbox code pollute host-side properties on any embedder-exposed object, including dispatch slots used by host code, potentially leading to host-side code execution when the polluted property is later consumed.