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CVE-2026-47698— vm2: Sandbox Breakout Using Dangerous Host Proto Mutators

Quick assessment

Affected
patriksimek vm2
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Patrik Simek vm2是Patrik Simek个人开发者的一个运行不受信任代码的沙箱环境。 Patrik Simek vm2 3.11.6之前版本存在处理逻辑错误漏洞，该漏洞源于lib/bridge.js和lib/setup-sandbox.js未能阻止通过Function.prototype.call的危险主机原型getter和setter修改器进行堆叠间接引用，可能导致沙箱代码切断主机固有原型链并执行任意主机命令。

CVSS 9.8 · Critical EPSS 0.49% · P40

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
patriksimek vm2 < 3.11.6 affected
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I. Basic Information for CVE-2026-47698

Vulnerability Information
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Vulnerability Title
vm2: Sandbox Breakout Using Dangerous Host Proto Mutators
Source: CVE Program / CVE List V5
Vulnerability Description
vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.6, lib/bridge.js and lib/setup-sandbox.js fail to block stacked indirection through Function.prototype.call around dangerous host prototype getter and setter mutators, allowing sandbox code to sever a host intrinsic's prototype chain and reach e.constructor.constructor for arbitrary host command execution. This issue is fixed in version 3.11.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
动态管理代码资源的控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Patrik Simek vm2 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Patrik Simek vm2是Patrik Simek个人开发者的一个运行不受信任代码的沙箱环境。 Patrik Simek vm2 3.11.6之前版本存在处理逻辑错误漏洞，该漏洞源于lib/bridge.js和lib/setup-sandbox.js未能阻止通过Function.prototype.call的危险主机原型getter和setter修改器进行堆叠间接引用，可能导致沙箱代码切断主机固有原型链并执行任意主机命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
patriksimek vm2 < 3.11.6 -

II. Public POCs for CVE-2026-47698

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 8270 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-47698

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Vendor Advisories for CVE-2026-47698 (1)

Vendor Pages for CVE-2026-47698 (1)

Same Patch Batch · patriksimek · 2026-08-17 · 3 CVEs total

CVE-2026-47686 9.9 CRITICAL vm2: Missing Error.cause Sanitization Enables VM2 Sandbox Escape to RCE
CVE-2026-47683 8.7 HIGH vm2: bufferAllocLimit cap bypassed by Buffer.concat and Buffer.from arrayLike

IV. Related Vulnerabilities

Same product: vm2
Same vendor: patriksimek
Same weakness: CWE-913

V. Comments for CVE-2026-47698

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