Vulnerability · Published Sep 17, 2026 · Assigned by VulnCheck

CVE-2026-92953vm2 3.11.0 through 3.11.7 Prototype Pollution via TypedArray

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 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)0.5%top 56.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	vm2	3.11.8	GHSA-3vgf-8m4q-q4qr

Affected products (as reported)

Vendor	Product	Versions
patriksimek	vm2	3.11.0 – before 3.11.8

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

References

GitHub Security Advisory (GHSA-3vgf-8m4q-q4qr) vendor-advisory
VulnCheck Advisory: vm2 3.11.0 through 3.11.7 Prototype Pollution via TypedArray third-party-advisory