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CVE-2026-92959— vm2 before 3.11.8 allowAsync Bypass via Promise Thenable

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 在 3.11.8 之前的版本中，未能完全强制 VM 和 NodeVM 中 选项的约束。虽然 已被替换为一个会抛出 "Async not available" 错误的处理函数，但沙箱中 的静态方法（如 、 、 、 和 ）仍然会处理攻击者提供的 thenable 对象：原生的 Promise 解析过程会执行 ，并在微任务中调用沙箱代码的 方法，而这一过程并未经过被修补的 处理函数，因此异步限制从未真正生效。结果是，沙箱内的脚本可以安排那些在 或 返回之后才执行的工作，并且会在宿主认为执行已经完成且超出设定超时的

CVSS 7.1 · High

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-92959

Vulnerability Information
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Vulnerability Title
vm2 before 3.11.8 allowAsync Bypass via Promise Thenable
Source: CVE Program / CVE List V5
Vulnerability Description
vm2 before 3.11.8 does not fully enforce the allowAsync: false option in VM and NodeVM. While localPromise.prototype.then is replaced with a handler that throws 'Async not available', the sandbox's Promise static methods (Promise.resolve, Promise.all, Promise.race, Promise.any, and Promise.allSettled) still assimilate attacker-supplied thenables: native promise resolution performs PromiseResolveThenableJob and invokes the sandboxed code's then method in a microtask without passing through the patched then, so the async restriction is never applied. As a result, sandboxed script can schedule work that runs after VM.run() or NodeVM.run() has returned and outside the configured timeout, continuing to execute after the host believes execution is complete.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
patriksimek vm2 0 ~ 3.11.8 -

II. Public POCs for CVE-2026-92959

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III. Intelligence Information for CVE-2026-92959

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Vendor Advisories for CVE-2026-92959 (2)

Same Patch Batch · patriksimek · 2026-09-17 · 30 CVEs total

CVE-2026-92947 10.0 CRITICAL vm2 before 3.11.7 Memory Disclosure via Buffer Pool
CVE-2026-92941 10.0 CRITICAL vm2 3.11.3 before 3.11.7 TLS Trust Store Manipulation
CVE-2026-92960 10.0 CRITICAL vm2 before 3.11.6 Process-wide State Exposure via os and dns
CVE-2026-92937 10.0 CRITICAL vm2 3.11.6 Remote Code Execution via Promise call/apply
CVE-2026-92940 10.0 CRITICAL vm2 3.11.3 through 3.11.6 HTTPS Credential Exposure via globalAgent
CVE-2026-92956 10.0 CRITICAL vm2 3.10.1 through 3.11.6 Sandbox Escape via WebAssembly.compileStreaming
CVE-2026-92953 10.0 CRITICAL vm2 3.11.0 through 3.11.7 Prototype Pollution via TypedArray
CVE-2026-92955 10.0 CRITICAL vm2 before 3.11.8 Sandbox Escape via NodeVM
CVE-2026-92946 10.0 CRITICAL vm2 before 3.11.7 Remote Code Execution via require.external
CVE-2026-92957 9.9 CRITICAL vm2 before 3.11.7 Authentication Bypass via node: Prefix
CVE-2026-92948 9.9 CRITICAL vm2 3.9.6 through 3.11.5 Sandbox Escape via node:test
CVE-2026-92939 9.9 CRITICAL vm2 3.11.3 through 3.11.6 Native Code Execution via crypto.setEngine
CVE-2026-92938 9.9 CRITICAL vm2 3.11.3 through 3.11.6 Remote Code Execution via node:sqlite
CVE-2026-92951 9.9 CRITICAL vm2 before 3.11.7 Module Allowlist Bypass via Custom Resolver
CVE-2026-92944 9.8 CRITICAL vm2 3.10.2 through 3.11.6 Sandbox Escape via Promise Protector
CVE-2026-92935 9.0 CRITICAL vm2 NodeVM Remote Code Execution via Array-Shaped Require
CVE-2026-92934 9.0 CRITICAL vm2 before 3.11.8 Sandbox Escape RCE via AggregateError
CVE-2026-92954 8.6 HIGH vm2 3.10.0 through 3.11.5 Denial of Service via Host Promise
CVE-2026-92950 8.6 HIGH vm2 before 3.11.7 Sandbox Escape via CLI require
CVE-2026-92958 8.5 HIGH vm2 before 3.11.7 Denylist Bypass via fs/promises

Showing top 20 of 30 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-92959

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