CVE-2026-9905

Description

Use after free in Accessibility 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 on Windows < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC for demonstrating Accessibility trigger condition.
This is a simplified HTML structure to test Accessibility interaction.
It does not contain an exploit payload.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9905 PoC</title>
</head>
<body>
    <script>
        // Create a target element that triggers Accessibility logic
        let target = document.createElement('div');
        target.setAttribute('role', 'button');
        target.setAttribute('aria-label', 'Test');
        document.body.appendChild(target);

        // Function to simulate the race condition or UAF trigger
        function trigger_vuln() {
            // Remove the element to attempt freeing memory
            document.body.removeChild(target);
            // Force Accessibility tree update (simplified concept)
            // In a real exploit, precise timing and heap grooming are required here
            target.getAttribute('role'); 
        }

        // User interaction required as per UI:R
        window.addEventListener('click', trigger_vuln);
    </script>
    <p>Click anywhere to trigger potential UAF in Accessibility.</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9905
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9905
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9905/
[4] VulDB https://vuldb.com/cve/CVE-2026-9905
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/498883610

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9905", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:48.553", "lastModified": "2026-05-29T16:16:36.987", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Accessibility 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/498883610", "source": "[email protected]"}]}}