PT-2026-42148 · Root+3 · @Rootio/Vm2+1
CVE-2026-47209
·
Published
2026-05-20
·
Updated
2026-07-21
CVSS v3.1
8.6
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N |
Name of the Vulnerable Software and Affected Versions
vm2 versions prior to 3.11.4
Description
The
BaseHandler.set trap in bridge.js ignores the receiver parameter and unconditionally writes to the host target object. According to the Proxy set trap specification, when the receiver is not the proxy (for example, when a child object inherits from the proxy via Object.create), the property assignment should create an own property on the receiver rather than on the proxy target. The current implementation always calls the otherReflectSet() function against the host target, which allows inherited property writes to leak to the host object. This creates an attack vector for writing dangerous cross-realm Symbol keys, such as nodejs.util.promisify.custom, to host objects, bypassing guards on the direct set path.Recommendations
Update to version 3.11.4 or later.
Exploit
Fix
LPE
Protection Mechanism Failure
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Weakness Enumeration
Related Identifiers
Affected Products
@Rootio/Vm2
Vm2