Incomplete List of Disallowed Inputs Affecting org.webjars.npm:vm2 package, versions [0,]
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- published1 Jun 2026
- disclosed29 May 2026
- creditq1uf3ng
Introduced: 29 May 2026
NewCVE-2026-47135 (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 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.