CVE-2026-9985

Description

Insufficient validation of untrusted input in Media in Google Chrome on ChromeOS prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Configurations (Affected Products)

No configuration data available.

Google Chrome on ChromeOS < 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>
<!-- Proof of Concept for CVE-2026-9985 -->
<html>
<head><title>CVE-2026-9985 PoC</title></head>
<body>
<script>
// This PoC demonstrates the concept of triggering the Media component
// with crafted input to potentially read memory contents.
// Requires running on a vulnerable Chrome version < 148.0.7778.216.

function triggerLeak() {
    // 1. Create a crafted media element or input
    // This simulates the specific input that bypasses validation
    let craftedInput = new Uint8Array(1024);
    // ... fill craftedInput with specific patterns to exploit the vulnerability ...

    // 2. Trigger the vulnerable Media API
    // Note: Specific API calls depend on the exact bug in the Media component
    try {
        let mediaElement = document.createElement('video');
        // Hypothetical vulnerable function call that leaks memory
        // mediaElement.processData(craftedInput); 

        // 3. If successful, memory data might be reflected or accessible
        console.log("Exploit triggered. Check memory dumps.");
    } catch (e) {
        console.error("Exploit failed or feature not supported: " + e);
    }
}

// Execute
triggerLeak();
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9985
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9985
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9985/
[4] VulDB https://vuldb.com/cve/CVE-2026-9985
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/513019760

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9985", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:56.740", "lastModified": "2026-05-29T18:17:17.580", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in Media in Google Chrome on ChromeOS prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to obtain potentially sensitive information from process memory 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:H/PR:N/UI:R/S:U/C:H/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/513019760", "source": "[email protected]"}]}}