Open-source package vulnerability · npm

GHSA-538q-xxpg-6h4r: Duplicate Advisory: vm2 sandbox escape via WebAssembly.compileStreaming Promise species bypass

criticalCVSS 4.0 10.0 · 3.1 10.0

This advisory was withdrawn on Oct 5, 2026. The publisher no longer considers it a valid vulnerability.

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-wjwh-qqvp-g4p4. This link is maintained to preserve external references. Original 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.

Published Sep 17, 2026 · Updated Oct 5, 2026

Affected packages

vm2

Ecosystem: npm
Affected: >= 3.10.1, <= 3.11.6
Fixed in: No patched version yet
Check: npm ls vm2

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-wjwh-qqvp-g4p4. This link is maintained to preserve external references.

Original 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.

Credited to portyu9.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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