CVE-2026-47131 vm2: Sandbox Escape
Attackers can escape the vm2 sandbox to execute arbitrary code on the host system by exploiting prototype manipulation techniques.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47131?
CVE-2026-47131 is a critical code injection vulnerability in patriksimek vm2, published on 12 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, 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. This issue has been patched in version 3.11.4.
Weakness: CWE-913
Which versions are affected by CVE-2026-47131?
2 open source packages ship an affected version, including vm2.
| Package | Affected | Fixed in |
|---|---|---|
vm2 npm | All versions | 3.11.4 |
vm2 npm | All versions | 3.11.4 |
How do I fix CVE-2026-47131?
Upgrade vm2 to 3.11.4 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-47131 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-47131 exists.
Sources
Also known as ECHO-9565-53a0-c71c, GHSA-v6mx-mf47-r5wg, MINI-6rh5-8mg5-hc8j, ROOT-APP-NPM-CVE-2026-47131.