Is CVE-2026-47209 actively exploited?

No active exploitation of CVE-2026-47209 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-47209 be exploited remotely?

Yes. CVE-2026-47209 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-47209?

CVE-2026-47209 has a CVSS score of 8.6 (HIGH).

HOME VULNERABILITIESCVE-2026-47209

HIGH

CVE-2026-47209

CWE-693Published: June 12, 2026· Updated: Jun 17, 2026

8.6

CVSS v3.1

EPSS:0.51%probability of exploitation in 30 daysPercentile:39.0th

Official Description

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, the BaseHandler.set trap in bridge.js (line 1231) ignores the receiver parameter and unconditionally writes to the host target object. Per the Proxy set trap specification, when receiver !== proxy (e.g., when a child object inherits from the proxy via Object.create), the property assignment should create an own property on the receiver, not on the proxy target. The current implementation always calls otherReflectSet(object, key, value) against the host target, causing all inherited property writes to leak through to the host object. This bug provides an alternative attack vector for writing dangerous cross-realm Symbol keys (e.g., nodejs.util.promisify.custom) to host objects, bypassing any future per-trap isDangerousCrossRealmSymbol guard on the direct set path. This issue has been patched in version 3.11.4.

NVD Source

Technical Analysis

CVE-2026-47209 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 8.6.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.