CVE-2026-9119

Description

Heap buffer overflow in WebRTC in Google Chrome on prior to 148.0.7778.179 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 < 148.0.7778.179

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC for CVE-2026-9119 (Google Chrome WebRTC Heap Buffer Overflow)
Description: This HTML page attempts to trigger the vulnerability via WebRTC.
Note: The specific payload to cause the crash requires analysis of the Chromium diff.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9119 PoC</title>
</head>
<body>
    <h1>CVE-2026-9119 WebRTC Heap Overflow Test</h1>
    <script>
        // Attempt to establish WebRTC connection which triggers the vulnerable code path
        const pc = new RTCPeerConnection();
        
        // Create a data channel to potentially manipulate buffer handling
        const dc = pc.createDataChannel("exploit_channel");
        
        // Simulate crafted offer/answer processing
        pc.createOffer().then(offer => {
            // In a real exploit, the SDP (Session Description Protocol) would be malformed
            // to trigger the heap overflow in the WebRTC stack.
            console.log("[+] Offer created, processing crafted SDP...");
            pc.setLocalDescription(offer);
        }).catch(e => console.log(e));

        console.log("[*] CVE-2026-9119: WebRTC Heap Buffer Overflow PoC Loaded");
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9119
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9119
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9119/
[4] VulDB https://vuldb.com/cve/CVE-2026-9119
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html
[6] https://issues.chromium.org/issues/502661101

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9119", "sourceIdentifier": "[email protected]", "published": "2026-05-20T20:16:43.387", "lastModified": "2026-05-20T20:16:43.387", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "Heap buffer overflow in WebRTC in Google Chrome on prior to 148.0.7778.179 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": "Primary", "description": [{"lang": "en", "value": "CWE-122"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0841193308.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/502661101", "source": "[email protected]"}]}}