Arbitrary Code Injection Affecting vm2 package, versions >=3.11.0 <3.11.2
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Start learning- Snyk IDSNYK-JS-VM2-16624526
- published10 May 2026
- disclosed8 May 2026
- creditXmiliaH
Introduced: 8 May 2026
NewCVE-2026-44009 (opens in a new tab)How to fix?
Upgrade vm2 to version 3.11.2 or higher.
Overview
vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules.
Affected versions of this package are vulnerable to Arbitrary Code Injection via the handleException function and the sandbox-side globalPromise.prototype.then wrapper in lib/setup-sandbox.js. An attacker can reach host Function and execute arbitrary code by throwing or resolving a sandbox-realm null-prototype object and then assigning a host function such as Buffer.prototype.inspect to a property on the caught/resolved value. The bridge proxy created for that value writes the raw host function back onto the underlying sandbox object, so the original sandbox reference exposes a host function whose .constructor leads to Function('return process')() and full sandbox escape.
Notes: This issue was introduced as part of the mitigation for CVE-2026-44000