CVE-2026-92949

Medium

Description

vm2 versions from 3.9.6 before 3.11.7 fail to properly restrict access to accessor properties on frozen objects, allowing sandboxed scripts to bypass vm.freeze() and vm.readonly() protections. Attackers can use Object.getOwnPropertyDescriptor() or __lookupSetter__() to extract and invoke host object setters directly, mutating properties the embedder explicitly marked read-only.

SeverityMedium

CVSS4.0

Exploit probability—

ProductVm2

PublishedSep 17, 2026

First seenSep 17, 2026

Weakness typeCWE-471CWE-471

How to fix

Update

vm23.11.7 or later

Vendor advisories

github.com/patriksimek/vm2/security/advisories/GHSA-633r-hq9m-c4ff

Affected products

Product	Affected versions	Fixed in
vm2npm	3.9.6 ≤ v < 3.11.7	3.11.7

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