CVE-2026-47686

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

At a glance

Severity: CRITICAL 9.9
EPSS: EPSS 0.58 % · percentile 48 (2026-10-27)
State: PUBLISHED
Published: 2026-08-17
Updated: 2026-08-19
Assigner: GitHub_M
NVD status: Deferred

Description

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	GitHub_M
CVSS 3.1	CRITICAL 9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	NVD · security-advisories@github.com (Secondary)

Weaknesses (CWE)

CWE-693

Advisories

GHSA-m283-3h24-438v — VM2 has Missing Error.cause Sanitization that Enables Sandbox Escape to RCE

European references

ENISA EUVD · EUVD-2026-60460
GCVE · GCVE-0-2026-47686

Affected products

Product	Versions
patriksimek · vm2	affected < 3.11.6

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD