CVE-2026-44008
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.85%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.85% probability · 56th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-668, CWE-1100
- Affected
- vm2 project/vm2
- Source
- security-advisories@github.com
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-9qj6-qjgg-37qqExploit, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:50850
- https://access.redhat.com/security/cve/CVE-2026-44008
- https://bugzilla.redhat.com/show_bug.cgi?id=2477201
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44008.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.