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CVE-2026-47139— vm2: NodeVM network builtin exclusions bypass via internal _http_client and _http_server

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.

patriksimek vm2是patriksimek的沙箱。 Patrik Simek vm2 3.11.4之前版本存在处理逻辑错误漏洞，该漏洞源于NodeVM支持的通配符选项排除公共网络内置模块时，未屏蔽Node.js暴露的内部HTTP内置模块（如_http_client和_http_server），导致沙箱代码可利用这些内部模块发起出站HTTP请求和打开监听HTTP套接字。

CVSS 8.6 · High EPSS 0.49% · P40

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
patriksimek vm2 < 3.11.4 affected
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I. Basic Information for CVE-2026-47139

Vulnerability Information
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Vulnerability Title
vm2: NodeVM network builtin exclusions bypass via internal _http_client and _http_server
Source: CVE Program / CVE List V5
Vulnerability Description
vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, NodeVM supports excluding public network builtins from the wildcard builtin option. With this configuration direct access to http, https, http2, net, dgram, tls, dns, and dns/promises is blocked. However, Node.js also exposes underscored internal HTTP builtins such as _http_client and _http_server. These are not blocked when the public modules are excluded. Sandboxed code can use these internal builtins to make outbound HTTP requests and open listening HTTP sockets even though the public network modules are denied. This issue has been patched in version 3.11.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
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
patriksimek vm2是patriksimek的沙箱。 Patrik Simek vm2 3.11.4之前版本存在处理逻辑错误漏洞，该漏洞源于NodeVM支持的通配符选项排除公共网络内置模块时，未屏蔽Node.js暴露的内部HTTP内置模块（如_http_client和_http_server），导致沙箱代码可利用这些内部模块发起出站HTTP请求和打开监听HTTP套接字。
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 < 3.11.4 -

II. Public POCs for CVE-2026-47139

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: _http_client.ClientRequest bypass confirmed — sandboxed code made outbound HTTP request. Proof token seen in request path.
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 8993 chars
GitHub 复现环境（可 clone 直接跑）
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III. Intelligence Information for CVE-2026-47139

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Patches & Fixes for CVE-2026-47139 (1)

Vendor Advisories for CVE-2026-47139 (1)

Vendor Pages for CVE-2026-47139 (1)

Same Patch Batch · patriksimek · 2026-06-12 · 9 CVEs total

CVE-2026-47140 10.0 CRITICAL vm2: NodeVM builtin denylist bypass via process and inspector/promises allows host code ex
CVE-2026-47208 10.0 CRITICAL vm2: Sandbox Breakout Using Promise Species
CVE-2026-47137 10.0 CRITICAL vm2: GHSA-8hg8-63c5-gwmx patch bypass: nesting:true without explicit require still allows
CVE-2026-47131 10.0 CRITICAL vm2: Sandbox Escape
CVE-2026-47210 9.8 CRITICAL vm2 sandbox escape via JSPI-backed Promise `.finally()` species bypass
CVE-2026-47135 8.7 HIGH vm2: Sandbox escape via unblocked cross-realm Symbol.for keys + missing bridge write-trap
CVE-2026-47209 8.6 HIGH vm2: Bridge Proxy set trap ignores receiver parameter, enabling host object property injec
CVE-2026-47141 vm2: NodeVM observability builtins leak host process and HTTP request data

IV. Related Vulnerabilities

Same product: vm2
Same vendor: patriksimek
Same weakness: CWE-693

V. Comments for CVE-2026-47139

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