by Kastro
Paper/Archive/CVE-2026-47686

CVE-2026-47686

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

EPSS 0.6%CVSS 9.9
critical.is priorityof 100
39
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 47.8.478 × 209.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
vm2< 3.11.6–CNA

Scores by source

GitHub_M (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/patriksimek/vm2/security/advisories/GHSA-m283-3h24-438vrefgithub.com/patriksimek/vm2/commit/7e3faaf550f4ab975bf4cdde183fcec49b056d8erefgithub.com/patriksimek/vm2/releases/tag/3.11.6