CVE-2026-44008: critical vulnerability in patriksimek vm2
vm2: Snabox breakout via `neutralizeArraySpeciesBatch`
Published · Updated
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 0.9%
exploitation probability
0.9%top 42% of all CVEs
observed exploitation
nono source reports it
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/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
patriksimek · vm2Related CVEs — patriksimek vm2
In the same product, most dangerous first.
CVE-2023-30547CRITICALSandbox Escape in vm2EPSS 72.1%CVE-2023-29017CRITICALvm2 Sandbox Escape vulnerabilityEPSS 63.2%CVE-2022-36067CRITICALvm2 vulnerable to Sandbox Escape before v3.9.11EPSS 47.9%CVE-2023-32314CRITICALSandbox EscapeEPSS 8.1%CVE-2023-37903CRITICALSandbox Escape in vm2EPSS 4.2%CVE-2023-37466CRITICALvm2 Sandbox Escape vulnerabilityEPSS 3.9%
References
https://access.redhat.com/errata/RHSA-2026:50850https://access.redhat.com/security/cve/CVE-2026-44008https://bugzilla.redhat.com/show_bug.cgi?id=2477201https://github.com/patriksimek/vm2/security/advisories/GHSA-9qj6-qjgg-37qqhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44008.json