CVE-2026-44008: CWE-668: Exposure of Resource to Wrong Sphere in patriksimek vm2
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.
AI Analysis
Technical Summary
The vm2 sandbox for Node.js versions prior to 3.11.2 contains a vulnerability where the neutralizeArraySpeciesBatch method can be tricked into exposing host objects through getters on the array prototype. This exposure enables attackers to access the host Function object, effectively escaping the sandbox environment and executing arbitrary code on the host system. The vulnerability is classified under CWE-668 (Exposure of Resource to Wrong Sphere) and CWE-1100. It has a CVSS 3.1 base score of 9.8, indicating critical severity. The vulnerability is fixed in vm2 version 3.11.2.
Potential Impact
Successful exploitation allows an attacker to escape the vm2 sandbox and execute arbitrary commands on the host system, leading to full compromise of the host environment. This can result in complete loss of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Upgrade vm2 to version 3.11.2 or later, where this vulnerability is fixed. No other mitigations are indicated by the vendor advisory. Patch status is confirmed fixed in 3.11.2.
CVE-2026-44008: CWE-668: Exposure of Resource to Wrong Sphere in patriksimek vm2
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 v3.1
Score 9.8critical
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vm2 sandbox for Node.js versions prior to 3.11.2 contains a vulnerability where the neutralizeArraySpeciesBatch method can be tricked into exposing host objects through getters on the array prototype. This exposure enables attackers to access the host Function object, effectively escaping the sandbox environment and executing arbitrary code on the host system. The vulnerability is classified under CWE-668 (Exposure of Resource to Wrong Sphere) and CWE-1100. It has a CVSS 3.1 base score of 9.8, indicating critical severity. The vulnerability is fixed in vm2 version 3.11.2.
Potential Impact
Successful exploitation allows an attacker to escape the vm2 sandbox and execute arbitrary commands on the host system, leading to full compromise of the host environment. This can result in complete loss of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Upgrade vm2 to version 3.11.2 or later, where this vulnerability is fixed. No other mitigations are indicated by the vendor advisory. Patch status is confirmed fixed in 3.11.2.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-04T21:24:36.505Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-44008","vendor":"Red Hat"}]
Threat ID: 6a04ba22cbff5d8610f482cf
Added to database: 05/13/2026, 17:51:30 UTC
Last enriched: 07/15/2026, 09:21:03 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 68
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