Vulnerability · Published Sep 17, 2026 · Assigned by VulnCheck

CVE-2026-92944vm2 3.10.2 through 3.11.6 Sandbox Escape via Promise Protector

Critical 9.8

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 0.8% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.8%top 41.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

vm2 versions 3.10.2 through 3.11.6 contain a sandbox escape vulnerability on Node.js 26 where Promise.prototype.finally() bypasses vm2's wrapper protections due to a stale PromiseThenLookupChain protector in V8 14.6. Attackers can exploit this by creating an async function that returns a Promise with an attacker-controlled constructor Symbol.species, allowing them to reach the host Function constructor and process object for arbitrary code execution.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	vm2	3.11.7	GHSA-27g9-p43v-cw3v

Affected products (as reported)

Vendor	Product	Versions
patriksimek	vm2	3.10.2 – before 3.11.7

Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-27g9-p43v-cw3v) vendor-advisory
Patch Commit patch
Patch Commit patch
VulnCheck Advisory: vm2 3.10.2 through 3.11.6 Sandbox Escape via Promise Protector third-party-advisory