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CVE-2026-47210— vm2 sandbox escape via JSPI-backed Promise `.finally()` species bypass

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，该漏洞源于沙箱逃逸漏洞，允许在暴露WebAssembly JSPI的运行时上执行不受信任代码时，绕过预期的Promise-species强化，从而暴露主机源的拒绝对象给攻击者控制的物种逻辑，打破沙箱边界，导致主机进程中执行任意代码。

CVSS 9.8 · Critical EPSS 0.82% · P56

Affected Version Matrix 1

VendorProduct Version RangeStatus
patriksimek vm2 < 3.11.4 affected
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I. Basic Information for CVE-2026-47210

Vulnerability Information
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Vulnerability Title
vm2 sandbox escape via JSPI-backed Promise `.finally()` species bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
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
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，该漏洞源于沙箱逃逸漏洞，允许在暴露WebAssembly JSPI的运行时上执行不受信任代码时，绕过预期的Promise-species强化，从而暴露主机源的拒绝对象给攻击者控制的物种逻辑，打破沙箱边界，导致主机进程中执行任意代码。
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-2026-47210

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 11422 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-2026-47210

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Vendor Advisories for CVE-2026-47210 (1)

Vendor Pages for CVE-2026-47210 (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-2026-47135 8.7 HIGH vm2: Sandbox escape via unblocked cross-realm Symbol.for keys + missing bridge write-trap
CVE-2026-47139 8.6 HIGH vm2: NodeVM network builtin exclusions bypass via internal _http_client and _http_server
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-913

V. Comments for CVE-2026-47210

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