CVE-2026-44005 Details
Description
vm2 is an open source vm/sandbox for Node.js. From 3.9.6 to 3.10.5, vm2's bridge exposes mutable proxies for real host-realm intrinsic prototypes and then forwards sandbox writes into the underlying host objects with otherReflectSet() and otherReflectDefineProperty(), which lets attacker-controlled JavaScript running in a default VM or inherited NodeVM mutate shared host Object.prototype, Array.prototype, and Function.prototype from inside the sandbox This vulnerability is fixed in 3.11.0.
A vulnerability in vm2 versions 3.9.6 prior to 3.10.5 allows for sandbox escape and prototype pollution. The issue arises because vm2's bridge exposes mutable proxies for real host-realm intrinsic prototypes. It forwards sandbox writes into the underlying host objects using otherReflectSet() and otherReflectDefineProperty(). This behavior enables attacker-controlled JavaScript running in a default VM or inherited NodeVM to modify shared host prototypes, including Object.prototype, Array.prototype, and Function.prototype, from within the sandbox.
Users can upgrade to vm2 version 3.11.0 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2026:50850 | redhat-SADP | |
| https://access.redhat.com/security/cve/CVE-2026-44005 | redhat-SADP | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2477205 | redhat-SADP | |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44005.json | redhat-SADP | |
| https://github.com/patriksimek/vm2/security/advisories/GHSA-vwrp-x96c-mhwq | CISA-ADP | ExploitVendor Advisory |
| https://github.com/patriksimek/vm2/security/advisories/GHSA-vwrp-x96c-mhwq | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1321 | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') | [email protected] |
| CWE-653 | Improper Isolation or Compartmentalization | redhat-SADP |
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| vm2 project vm2 | >= 3.9.6, < 3.11.0 |
CPE
Remediation
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Change History
12 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 7, 2026 | CVE Modified | redhat-SADP |
| Sep 4, 2026 | CVE Modified | redhat-SADP |
| Sep 4, 2026 | CVE Modified | CISA-ADP |
| Sep 4, 2026 | CVE Modified | [email protected] |
| Aug 6, 2026 | CVE Modified | redhat-SADP |
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| May 14, 2026 | CVE Modified | CISA-ADP |
| May 14, 2026 | Initial Analysis | [email protected] |
| May 13, 2026 | New CVE Received | [email protected] |