CVE-2026-44008

vm2: Snabox breakout via `neutralizeArraySpeciesBatch`

At a glance

Severity: CRITICAL 9.8
EPSS: EPSS 0.85 % · percentile 58 (2026-10-27)
State: PUBLISHED
Published: 2026-05-13
Updated: 2026-09-07
Assigner: GitHub_M
NVD status: Modified

Description

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.2, the new method neutralizeArraySpeciesBatch works with objects from the other side but can call into this side via getter on the array prototype exposing objects of the wrong side into the sandbox. This can be used to get host objects and get the host Function object. This allows attackers to write code which can escape from the VM2 sandbox and execute arbitrary commands on the host system. This vulnerability is fixed in 3.11.2.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub_M
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	redhat-SADP
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · security-advisories@github.com (Secondary)
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Weaknesses (CWE)

Advisories

GHSA-9qj6-qjgg-37qq — vm2 has sandbox breakout via `neutralizeArraySpeciesBatch`

European references

ENISA EUVD · EUVD-2026-30078
GCVE · GCVE-0-2026-44008

Affected configurations (NVD CPE)

cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* < 3.11.2

Affected products

Product	Versions
patriksimek · vm2	affected < 3.11.2

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