CVE-2026-8548

Description

Out of bounds write in Media in Google Chrome prior to 148.0.7778.168 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

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 < 148.0.7778.168

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
  PoC for CVE-2026-8548 (Conceptual)
  This HTML page demonstrates the trigger vector for the Media component bug.
  Exploitation requires a renderer compromise followed by this specific trigger.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-8548 PoC</title>
</head>
<body>
    <h1>CVE-2026-8548 Media OOB Write PoC</h1>
    <!-- Targeted Media Element -->
    <video id="targetVideo" src="crafted_payload.webm" controls></video>
    
    <script>
        // Attempt to trigger the vulnerability
        const video = document.getElementById('targetVideo');
        
        video.addEventListener('play', () => {
            console.log('Video playback started - triggering OOB write condition');
            
            // In a real exploit scenario, specific timing and memory manipulation
            // would occur here to corrupt the heap and escape the sandbox.
            trigger_exploit();
        });

        function trigger_exploit() {
            // Placeholder for the actual memory corruption logic
            // This involves manipulating the Media component state
            // to write data out of bounds.
            alert('Vulnerability triggered! (Simulation)');
        }

        // Auto play to initiate the attack chain
        video.play().catch(e => console.log('Interaction required'));
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8548
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8548
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8548/
[4] VulDB https://vuldb.com/cve/CVE-2026-8548
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
[6] https://issues.chromium.org/issues/497821764

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8548", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:15.700", "lastModified": "2026-05-14T22:16:48.700", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds write in Media in Google Chrome prior to 148.0.7778.168 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape 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: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-787"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/497821764", "source": "[email protected]"}]}}