AIKIDO-2026-873583
vm2 is vulnerable to Prototype Pollution
100
Critical Risk
This Affects:
vm2TL;DR
The protected-object inventory used to shield host intrinsics from the sandbox omits the typed-array, ArrayBuffer, and related binary-data prototypes. Sandboxed code walks the prototype chain to reach and mutate host Uint8Array.prototype, %TypedArray%.prototype, and ArrayBuffer.prototype. Modifying these host intrinsics corrupts host binary-data handling and undermines the sandbox boundary. The fix registers the binary-data and iterator intrinsics in the protected-object inventory so their host prototypes can no longer be modified.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you execute untrusted JavaScript in a vm2 sandbox.
Background info
vm2 is vulnerable to Prototype Pollution in versions 3.11.0 - 3.11.7.
How to fix this
Upgrade the vm2 library to the patch version.
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