Prototype Pollution Vulnerability in node-cube

[me0wxy]

Prototype Pollution Vulnerability in node-cube

Summary

A prototype pollution vulnerability in the node-cube package allows attackers to inject arbitrary properties into the prototype of built-in JavaScript objects. This critical flaw enables denial of service (DoS) or arbitrary code execution in environments using affected versions, requiring no authentication for exploitation.

Details

The vulnerability stems from improper validation of user-supplied input during resource initialization in versions prior to 5.0.0. Specifically, the setRequires method in the cycle_check module fails to sanitize inputs, allowing malicious actors to manipulate prototype chains of native objects. This issue falls under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes.

The package's resource initialization process accepts untrusted input without validation, making it possible to overwrite or add properties to global object prototypes (e.g., Object.prototype). Successful exploitation could disrupt application logic, corrupt data integrity, or execute arbitrary code in the context of the running process.

• Vulnerable Versions: All versions up to and including 5.0.0-beta.19
• Fixed Version: No official fix available
• Package URL: https://github.com/fishbar/cube

Impact

This vulnerability affects any application using node-cube for client-side JavaScript execution in browser environments. Attackers can exploit this flaw to:

• Crash services or corrupt application state (DoS)
• Bypass security controls relying on prototype integrity
• Execute arbitrary code in the context of the Node.js runtime

Developers and organizations relying on this package for browser-based JavaScript execution are strongly advised to audit their dependencies and monitor for potential patches. The lack of input validation in a widely used utility library classifies this as a high-severity issue under the Prototype Pollution category.#