CVE-2026-9890

Description

Use after free in XR in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

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 < 148.0.7778.216 on Windows

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
// PoC for CVE-2026-9890
// Conceptual demonstration of triggering UAF in Chrome XR
-->
<html>
<head>
<title>CVE-2026-9890 PoC</title>
</head>
<body>
<script>
async function trigger_vuln() {
    try {
        // Check WebXR support
        if (navigator.xr) {
            console.log("[+] WebXR supported");
            // The actual trigger requires specific heap grooming
            // and interaction with the XR compositor.
            // This is a placeholder for the malicious HTML structure.
            
            // Simulate interaction that leads to UAF
            let fake_obj = {};
            let ref = fake_obj;
            
            // In a real exploit, this would involve specific XRSession calls
            // that cause the browser to dereference a freed pointer.
            console.log("[+] Attempting to trigger UAF in XR module...");
            
            // Hypothetical function call sequence
            // await navigator.xr.requestSession('immersive-vr', ...);
            // ... exploit logic ...
            
        } else {
            console.log("[-] WebXR not supported on this device/browser");
        }
    } catch (e) {
        console.log(e);
    }
}

trigger_vuln();
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9890
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9890
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9890/
[4] VulDB https://vuldb.com/cve/CVE-2026-9890
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/513135985

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9890", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:46.983", "lastModified": "2026-05-29T16:16:35.223", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in XR in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)"}], "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_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/513135985", "source": "[email protected]"}]}}