CVE-2026-47686

vm2: Missing Error.cause Sanitization Enables VM2 Sandbox Escape to RCE

CRITICAL 9.9EPSS 0.6%

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.6, handleException() in lib/setup-sandbox.js sanitizes SuppressedError.error, SuppressedError.suppressed, and AggregateError.errors but does not sanitize Error.cause, allowing sandbox code to obtain a powerful host object such as process from an embedder-exposed host function that throws an error with that object as its cause and then execute arbitrary host commands. This issue is fixed in version 3.11.6.

Affected: patriksimek · vm2
CVSS v3.1 GITHUB: 9.9 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS: 0.58% chance of exploitation in the next 30 days, 47th percentile
Published: 2026-08-17
Updated: 2026-08-19

Proof-of-concept exploits (1)

advisories/GHSA-m283-3h24-438v

References

CVE Record
NVD entry