patriksimek vm2 up to 3.11.7 Bridge lib/setup-sandbox.js events.once return value

Summaryinfo

A vulnerability was found in patriksimek vm2 up to 3.11.7. It has been declared as problematic. This issue affects the function events.once of the file lib/setup-sandbox.js of the component Bridge. Such manipulation leads to return value. This vulnerability is traded as CVE-2026-92954. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in patriksimek vm2 up to 3.11.7 and classified as problematic. Affected by this issue is the function events.once of the file lib/setup-sandbox.js of the component Bridge. The manipulation with an unknown input leads to a return value vulnerability. Using CWE to declare the problem leads to CWE-252. The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. Impacted is availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-92954 since 09/17/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 3.11.8 eliminates this vulnerability.

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Productinfo

Vendor

• patriksimek

Name

• vm2

Version

• 3.11.0
• 3.11.1
• 3.11.2
• 3.11.3
• 3.11.4
• 3.11.5
• 3.11.6
• 3.11.7

Website

• Product: https://github.com/patriksimek/vm2/

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