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CVE-2026-92956

10 CRITICALpublic exploit available

Published 2026-09-17 · Updated 2026-09-17

AI risk analysis

Summary
This flaw allows sandbox escape via WebAssembly, enabling access to host Node.js capabilities within a sandboxed environment. It is critical due to the potential for full host system compromise.
Exploitability
Exploitation is relatively straightforward as it requires running a specific WebAssembly code in a default sandbox setup. No additional permissions or configurations are needed.
Blast radius
If exploited, this can lead to full compromise of the host system, including access to sensitive files and modules like fs.
Detection
No reliable host or network indicator is derivable from the published description.
Prioritized remediation
Upgrade to vm2 version 3.11.7 or later.
rcewebvm2nodejswasmsandbox

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

vm2 versions 3.10.1 through 3.11.6 contain a sandbox escape reachable from a default `new VM()` sandbox when running on Node.js 26. WebAssembly.compileStreaming and WebAssembly.instantiateStreaming can produce a raw host-realm Promise that rejects with a host-realm error object; by controlling Symbol.species via Promise.prototype.finally, sandbox code receives that raw host error, walks from the host error constructor to the host Function constructor, and recovers the real host `process` object, gaining host Node.js capabilities (e.g. access to host modules such as fs) in the context of the process running the sandbox. No NodeVM, require permission, host object injection, or otherwise unsafe configuration is required. This is a bypass of the fix for GHSA-6j2x-vhqr-qr7q, which removed the JSPI entry points WebAssembly.promising and WebAssembly.Suspending. The issue is fixed in 3.11.7.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-693

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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