Improper Isolation or Compartmentalization Affecting vm2 package, versions <3.11.0
Threat Intelligence
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-VM2-16439008
- published7 May 2026
- disclosed7 May 2026
- creditkoDove
Introduced: 7 May 2026
NewCVE-2026-44003 (opens in a new tab)How to fix?
Upgrade vm2 to version 3.11.0 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 Improper Isolation or Compartmentalization through the transformer fast-path in the source instrumentation logic. An attacker can expose the internal VM state and reach the wrapWith/handleException/import-related leak by supplying JavaScript that references VM2_INTERNAL_STATE_DO_NOT_USE_OR_PROGRAM_WILL_FAIL with Unicode escape sequences such as \u0056 or \u{56} so the raw substring check misses it.