Prototype Pollution in jQWidgets JavaScript Framework

A vulnerability was determined in jQWidgets up to 24.0.1. This affects the function JQXLite.extend/jqxBaseFramework.extend of the file jqwidgets/jqx-all.js. This manipulation causes improperly controlled modification of object prototype attributes. The attack can be initiated remotely. The reported GitHub issue was closed with the label "not planned".

Casky was already ahead

This CVE exploits attack patterns that Casky's 322matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

CVE-2026-78178 represents a prototype pollution vulnerability in jQWidgets, a popular JavaScript UI framework affecting versions up to 24.0.1. The flaw exists in the JQXLite.extend and jqxBaseFramework.extend functions within jqx-all.js, allowing attackers to manipulate JavaScript object prototype attributes through improperly controlled object modifications. This vulnerability matters because prototype pollution can lead to widespread application compromise—attackers can inject malicious properties into base JavaScript objects, affecting all instances created thereafter. Organizations using jQWidgets in web applications, dashboards, or any JavaScript-dependent systems are at risk, particularly when user input flows into these extend functions without proper validation. The vulnerability's CVSS score of 7.3 indicates high severity with remote attack vectors requiring minimal privileges.

Casky's 322 mapped skills leverage Claude's extended reasoning to detect the attack patterns associated with this CVE by analyzing MITRE ATT&CK techniques TA0001 (Initial Access) and TA0043 (Reconnaissance). Security practitioners using Casky would identify this vulnerability through detection of suspicious prototype chain modifications—specifically monitoring for attempts to set properties on Object.prototype or similar base constructors via extend() function calls with untrusted data (CWE-94: Code Injection). The platform's skills would flag instances of dynamic property assignment patterns, malformed object literals passed to extend functions, and post-exploitation behaviors where injected prototype properties affect downstream object instantiation. Practitioners would see findings highlighting the data flow from user-controlled inputs through jqxBaseFramework.extend, combined with behavioral indicators showing modified prototype chains affecting application logic—enabling them to correlate reconnaissance activities with exploitation attempts before prototype pollution enables privilege escalation or persistent code execution.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

322 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-78178.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

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abusing-dpapi-for-credential-access

red teaming · high

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abusing-shadow-credentials-for-privesc

red teaming · high

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MITRE ATT&CK Techniques

TA0001 TA0043

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