CVE-2026-47210: CWE-913: Improper Control of Dynamically-Managed Code Resources in patriksimek vm2
vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, a sandbox escape vulnerability in vm2 allows arbitrary code execution in the host process when untrusted code is executed with async support on runtimes exposing WebAssembly JSPI (WebAssembly.promising / WebAssembly.Suspending). In the tested configuration, a JSPI-backed Promise can reach Promise.prototype.finally() in a way that bypasses the expected Promise-species hardening and exposes a host-originated rejection object to attacker-controlled species logic, breaking the sandbox boundary. This issue has been patched in version 3.11.4.
AI Analysis
Technical Summary
CVE-2026-47210 is a critical sandbox escape vulnerability in the vm2 Node.js sandbox prior to version 3.11.4. The flaw arises when untrusted code executes asynchronously on runtimes exposing WebAssembly JSPI (such as WebAssembly.promising or WebAssembly.Suspending). In this context, a JSPI-backed Promise can reach Promise.prototype.finally() in a manner that bypasses the expected Promise-species hardening. This allows exposure of a host-originated rejection object to attacker-controlled species logic, effectively breaking the sandbox boundary and enabling arbitrary code execution in the host process. The vulnerability is patched in vm2 version 3.11.4.
Potential Impact
Successful exploitation allows an attacker to escape the vm2 sandbox and execute arbitrary code within the host process. This compromises the isolation guarantees of the sandbox, potentially leading to full system compromise or unauthorized access to host resources.
Mitigation Recommendations
A fix is available in vm2 version 3.11.4. Users should upgrade to version 3.11.4 or later to remediate this vulnerability. No other mitigations are specified.
CVE-2026-47210: CWE-913: Improper Control of Dynamically-Managed Code Resources in patriksimek vm2
Description
vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, a sandbox escape vulnerability in vm2 allows arbitrary code execution in the host process when untrusted code is executed with async support on runtimes exposing WebAssembly JSPI (WebAssembly.promising / WebAssembly.Suspending). In the tested configuration, a JSPI-backed Promise can reach Promise.prototype.finally() in a way that bypasses the expected Promise-species hardening and exposes a host-originated rejection object to attacker-controlled species logic, breaking the sandbox boundary. This issue has been patched in version 3.11.4.
CVSS v3.1
Score 9.8critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-47210 is a critical sandbox escape vulnerability in the vm2 Node.js sandbox prior to version 3.11.4. The flaw arises when untrusted code executes asynchronously on runtimes exposing WebAssembly JSPI (such as WebAssembly.promising or WebAssembly.Suspending). In this context, a JSPI-backed Promise can reach Promise.prototype.finally() in a manner that bypasses the expected Promise-species hardening. This allows exposure of a host-originated rejection object to attacker-controlled species logic, effectively breaking the sandbox boundary and enabling arbitrary code execution in the host process. The vulnerability is patched in vm2 version 3.11.4.
Potential Impact
Successful exploitation allows an attacker to escape the vm2 sandbox and execute arbitrary code within the host process. This compromises the isolation guarantees of the sandbox, potentially leading to full system compromise or unauthorized access to host resources.
Mitigation Recommendations
A fix is available in vm2 version 3.11.4. Users should upgrade to version 3.11.4 or later to remediate this vulnerability. No other mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-18T22:25:21.257Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2c1a23e617e2d8347eb1f6
Added to database: 06/12/2026, 14:39:31 UTC
Last enriched: 06/19/2026, 18:23:53 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 80
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