CVE-2026-92953 vm2 3.11.0 through 3.11.7 Prototype Pollution via TypedArray
Attackers can escape the vm2 sandbox via prototype pollution to execute arbitrary code on the host system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-92953?
CVE-2026-92953 is a critical code injection vulnerability in patriksimek vm2, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
vm2 versions from 3.11.0 before 3.11.8 fail to protect host TypedArray and ArrayBuffer prototypes from sandbox mutation. Attackers can use prototype-walking primitives to reach and modify host Uint8Array.prototype, %TypedArray%.prototype, and ArrayBuffer.prototype, causing host-created typed arrays to observe attacker-controlled properties after VM.run() returns.
Weakness: CWE-913
Which versions are affected by CVE-2026-92953?
2 open source packages ship an affected version, including vm2.
| Package | Affected | Fixed in |
|---|---|---|
vm2 npm | From 3.11.0 | 3.11.8 |
vm2 npm | From 3.11.0 | 3.11.8 |
How do I fix CVE-2026-92953?
Upgrade vm2 to 3.11.8 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-92953 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-92953 exists.
Sources
Also known as CLEANSTART-2026-NR22907, ECHO-68ba-f48a-b95f, GHSA-3vgf-8m4q-q4qr, MINI-4v84-226r-5288, ROOT-APP-NPM-CVE-2026-92953.