CVE-2026-92954

vm2 is a sandbox library for running untrusted JavaScript in Node.js. In versions >= 3.10.0 and <= 3.11.7, Promises returned from the host realm into the sandbox are not marked as handled at the bridge boundary; only Promises created inside the sandbox are wrapped with a rejection-swallowing handler (lib/setup-sandbox.js), and the bridge only installs host-side rejection sanitizers when sandbox code calls .then/.catch/.finally. As a result, code running in the sandbox can invoke a host function that returns a rejected Promise (for example events.once() exposed via the NodeVM events builtin, or any embedder-provided Promise-returning API) and simply ignore the return value, leaving the host Promise unhandled so that Node.js's default unhandled-rejection behavior terminates the host process. This is an incomplete fix of GHSA-hw58-p9xv-2mjh. The issue is fixed in version 3.11.8.

• CWE-248

• https://github.com/patriksimek/vm2/security/advisories/GHSA-gjq8-xm47-88rc
• https://www.vulncheck.com/advisories/vm2-3.10.0-through-3.11.5-denial-of-service-via-host-promise

Published

Sep 17, 2026

Last Modified

Sep 17, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-92949vm2 versions from 3.9.6 before 3.11.7 fail to properly restr…4
• CVE-2026-9295A security flaw has been discovered in Edimax BR-6428NS 1.10…8.8
• CVE-2026-92950vm2 before 3.11.7 contains a sandbox escape vulnerability in…8.6
• CVE-2026-92951vm2 before 3.11.7 contains an incorrect authorization vulner…9.9
• CVE-2026-92952vm2 versions 3.11.4 through 3.11.6 incompletely filter Node.…6.8
• CVE-2026-92953vm2 versions from 3.11.0 before 3.11.8 fail to protect host …10
• CVE-2026-92955vm2 before 3.11.8 contains a sandbox escape vulnerability in…10
• CVE-2026-92956vm2 versions 3.10.1 through 3.11.6 contain a sandbox escape …10
• CVE-2026-92957vm2 through 3.11.6 does not normalize `node:`-prefixed built…9.9
• CVE-2026-92958vm2 through 3.11.6 contains a builtin-module denylist bypass…8.5
• CVE-2026-92959vm2 before 3.11.8 does not fully enforce the allowAsync: fal…7.1
• CVE-2026-9296A weakness has been identified in Edimax BR-6428NS 1.10. Thi…6.3