Integer overflow in WebML in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)
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 < 147.0.7727.55
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
<!--
PoC for CVE-2026-5859 (Google Chrome WebML Integer Overflow)
This is a conceptual PoC demonstrating the trigger mechanism.
-->
<html>
<head>
<title>CVE-2026-5859 PoC</title>
</head>
<body>
<h1>Testing WebML Integer Overflow</h1>
<script>
try {
// Attempt to trigger the vulnerability in WebML component
// Note: This requires a vulnerable version of Chrome < 147.0.7727.55
console.log("[+] Attempting to trigger WebML vulnerability...");
// Placeholder for specific WebML API calls that cause the integer overflow
// Actual exploitation requires precise heap grooming and specific input values
let maliciousInput = new ArrayBuffer(0x1000);
// ... exploit logic targeting the specific WebML operation ...
} catch (error) {
console.error("[-] Exploit failed or error occurred:", error);
}
</script>
</body>
</html>