Inappropriate implementation in V8 in Google Chrome prior to 147.0.7727.55 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 < 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-2026-5863 (V8 RCE)
This is a conceptual demonstration of triggering the V8 vulnerability.
-->
<html>
<head>
<script>
function trigger_vuln() {
// Attempt to trigger type confusion in V8
let obj = {};
obj.a = 1;
// Force optimization
for (let i = 0; i < 10000; i++) {
// The specific operation that triggers the vulnerability
// would replace this generic logic in a real exploit
let x = obj.a + i;
if (i === 9999) {
console.log("Vulnerability Triggered");
}
}
}
trigger_vuln();
</script>
</head>
<body>
<h1>CVE-2026-5863 PoC Test</h1>
</body>
</html>