Vulnerability · Published Sep 17, 2026 · Assigned by VulnCheck

CVE-2026-92955vm2 before 3.11.8 Sandbox Escape via NodeVM

Critical 10.0

In plain English

A critical-severity security flaw in vm2 from patriksimek. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)0.7%top 46.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

vm2 before 3.11.8 contains a sandbox escape vulnerability in NodeVM that allows attackers to access the host __proto__ getter/setter through console._stdout and console._stderr. Attackers can overwrite EventEmitter.prototype.emit and trigger process events to execute code with process context, bypassing code generation restrictions.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	vm2	3.11.8	GHSA-88hf-g992-jg85

Affected products (as reported)

Vendor	Product	Versions
patriksimek	vm2	0 – before 3.11.8

Weakness: CWE-913 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-88hf-g992-jg85) vendor-advisory
VulnCheck Advisory: vm2 before 3.11.8 Sandbox Escape via NodeVM third-party-advisory