CVE-2026-44008
vm2 has sandbox breakout via `neutralizeArraySpeciesBatch`
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| redhat-SADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.89% · top 40% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
- affected < 3.11.2
Affected packages
From reviewed advisories of the GitHub Advisory Database.
References (7)
- https://github.com/patriksimek/vm2/security/advisories/GHSA-9qj6-qjgg-37qq (opens in a new tab)x_refsource_CONFIRM
- https://github.com/patriksimek/vm2/commit/ca195f0178989d6f59eafb7af965806f829e20f7 (opens in a new tab)x_refsource_MISC
- https://access.redhat.com/errata/RHSA-2026:50850 (opens in a new tab)x_refsource_MISCvendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-44008 (opens in a new tab)x_refsource_MISCvdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2477201 (opens in a new tab)x_refsource_MISCissue-trackingx_refsource_REDHAT
- https://github.com/patriksimek/vm2/releases/tag/v3.11.2 (opens in a new tab)x_refsource_MISC
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44008.json (opens in a new tab)x_refsource_MISCx_sadp-csaf-vex
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-9qj6-qjgg-37qq (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-44008)Record last updated .