Exposure of Resource to Wrong Sphere Affecting vm2 package, versions <3.12.2
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-VM2-20158392
- published27 Sept 2026
- disclosed27 Sept 2026
- creditUnknown
Introduced: 27 Sep 2026
NewCVE-2026-100723 (opens in a new tab)How to fix?
Upgrade vm2 to version 3.12.2 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 Exposure of Resource to Wrong Sphere via the bufferFrom and related Buffer factory functions in lib/setup-sandbox.js, where Node.js serves small Buffer.from(...) allocations out of a single shared 64 KiB backing ArrayBuffer pool. A sandbox attacker can call Buffer.from([0]).buffer to obtain the entire shared pool ArrayBuffer, then construct a full-width view with Buffer.from(ab, 0, ab.byteLength) to read and overwrite every host-realm buffer that shares the pool, including secrets, database rows, and tokens held by the host process. This constitutes a full confidentiality and integrity escape from the sandbox.