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CVE-2026-43997— vm2: Sandbox Escape

Quick assessment

Affected
patriksimek vm2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

vm2是捷克Patrik Simek个人开发者的一个 Node.js 的高级虚拟机/沙盒。以使用列入白名单的 Node 内置模块运行不受信任的代码。 vm2 3.11.0之前版本存在代码注入漏洞，该漏洞源于可能获取宿主Object对象，允许通过多种方式利用宿主Object逃逸沙箱。

CVSS 10.0 · Critical EPSS 0.77% · P54

Possible ATT&CK Techniques 1 AI

T1610 · Deploy Container

Affected Version Matrix 1

VendorProduct Version RangeStatus
patriksimek vm2 < 3.11.0 affected
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I. Basic Information for CVE-2026-43997

Vulnerability Information
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Vulnerability Title
vm2: Sandbox Escape
Source: CVE Program / CVE List V5
Vulnerability Description
vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, it is possible to obtain the host Object. There are various ways to use the host Object, to escape the sandbox, one example would be using HostObject.getOwnPropertySymbols to obtain Symbol(nodejs.util.inspect.custom). This vulnerability is fixed in 3.11.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
vm2 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
vm2是捷克Patrik Simek个人开发者的一个 Node.js 的高级虚拟机/沙盒。以使用列入白名单的 Node 内置模块运行不受信任的代码。 vm2 3.11.0之前版本存在代码注入漏洞，该漏洞源于可能获取宿主Object对象，允许通过多种方式利用宿主Object逃逸沙箱。
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 < 3.11.0 -

II. Public POCs for CVE-2026-43997

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III. Intelligence Information for CVE-2026-43997

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Vendor Advisories for CVE-2026-43997 (1)

Same Patch Batch · patriksimek · 2026-05-13 · 14 CVEs total

CVE-2026-44005 10.0 CRITICAL vm2: Sandbox escape
CVE-2026-44006 10.0 CRITICAL vm2: Sandbox Escape
CVE-2026-43999 9.9 CRITICAL vm2: NodeVM builtin allowlist bypass via `module` builtin's `Module._load` allows sandbox
CVE-2026-45411 9.8 CRITICAL vm2: Sandbox Breakout Using Async Generator
CVE-2026-44009 9.8 CRITICAL vm2: Sandbox Breakout Through Null Proto Exception
CVE-2026-44008 9.8 CRITICAL vm2: Snabox breakout via `neutralizeArraySpeciesBatch`
CVE-2026-44007 9.1 CRITICAL vm2: nesting: true bypasses require: false, allowing sandbox escape to arbitrary OS comman
CVE-2026-44001 8.6 HIGH vm2: Sandbox Escape via Promise Constructor Unhandled Rejection (Process Crash DoS)
CVE-2026-43998 8.5 HIGH vm2: NodeVM require.root bypass via symlink traversal allows sandbox escape
CVE-2026-44004 7.5 HIGH vm2: Host Process OOM DoS via Buffer.alloc (Timeout Bypass)
CVE-2026-44000 6.5 MEDIUM vm2: sandbox boundary bypass via host Promise resolution preserving host object identity
CVE-2026-44002 5.8 MEDIUM vm2: Host File Path Disclosure via Stack Trace Information Leak
CVE-2026-44003 5.3 MEDIUM vm2: Transformer Fast-Path Bypass Exposes Internal State Variable

IV. Related Vulnerabilities

Same product: vm2
Same vendor: patriksimek
Same weakness: CWE-94

V. Comments for CVE-2026-43997

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