Incomplete List of Disallowed Inputs Affecting vm2 package, versions <3.11.4
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-VM2-17111274
- published31 May 2026
- disclosed29 May 2026
- creditq1uf3ng
Introduced: 29 May 2026
NewCVE-2026-47135 (opens in a new tab)How to fix?
Upgrade vm2 to version 3.11.4 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 Incomplete List of Disallowed Inputs through Symbol.for handling in lib/setup-sandbox.js and the bridge write traps in lib/bridge.js. An attacker can install host-side hooks or alter host object behavior by supplying nodejs.* symbol keys such as nodejs.util.promisify.custom, stream brand symbols, or webstream symbols on a bridge-exposed host object. The sandbox-side symbol registry exposed real cross-realm Node internal symbols for keys outside the original allowlist, and the bridge forwarded dangerous symbol keys through set, defineProperty, and deleteProperty without rejecting them. This lets sandbox code hijack util.promisify callbacks, or interfere with webstream error handling on mutable host objects exposed to the VM.