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CVE-2026-100722— vm2 before 3.12.2 Host Process Termination via Construct Trap

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.

在 vm2 3.12.2 版本之前，sandbox-to-host（沙箱到主机）的 construct 陷阱未正确应用主机侧的 Promise 拒绝处理机制。在 BaseHandler 中，apply 陷阱会对返回值调用 ，但相邻的 construct 路径仅返回 的结果，而未进行相同的清理处理。如果嵌入程序暴露了一个可构造的主机函数，且其构造函数返回一个原生拒绝态（rejected）的 Promise，那么通过 执行的不受信任脚本可以使用 关键字调用该函数并忽略返回结果；此时，被拒绝的主机 Promise 会在未

CVSS 6.8 · Medium EPSS 0.26% · P16
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I. Basic Information for CVE-2026-100722

Vulnerability Information
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Vulnerability Title
vm2 before 3.12.2 Host Process Termination via Construct Trap
Source: CVE Program / CVE List V5
Vulnerability Description
vm2 before 3.12.2 does not apply host-side Promise rejection handling in the sandbox-to-host construct trap. In BaseHandler, the apply trap calls markHostPromiseHandled() on the returned value, but the adjacent construct path returns the result of Reflect.construct without the same sanitization. If an embedder exposes a constructable host function whose constructor returns a native rejected Promise, an untrusted script executed via VM.run can invoke it with `new` and ignore the result; the rejected host Promise crosses the bridge unhandled and, under Node's strict unhandled-rejection policy, is promoted to an uncaught exception that terminates the host process.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
patriksimek vm2 0 ~ 3.12.2 -

II. Public POCs for CVE-2026-100722

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III. Intelligence Information for CVE-2026-100722

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Vendor Advisories for CVE-2026-100722 (1)

Other References for CVE-2026-100722 (1)

Same Patch Batch · patriksimek · 2026-09-27 · 3 CVEs total

CVE-2026-100721 9.0 CRITICAL vm2 before 3.12.2 Authorization Bypass via Custom Resolver
CVE-2026-100723 7.5 HIGH vm2 before 3.12.2 Memory Disclosure via zlib Buffer Pool

IV. Related Vulnerabilities

Same product: vm2
Same vendor: patriksimek
Same weakness: CWE-248

V. Comments for CVE-2026-100722

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