CVE-2026-9944

Description

Uninitialized Use in ANGLE in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

3.1

Severity

LOW

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Google Chrome < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC Concept for CVE-2026-9944
This PoC demonstrates the trigger condition for the uninitialized use in ANGLE.
Note: Actual exploitation requires a renderer compromise.
-->
<html>
<head>
    <title>CVE-2026-9944 PoC</title>
</head>
<body>
    <canvas id="glCanvas"></canvas>
    <script>
        const canvas = document.getElementById('glCanvas');
        const gl = canvas.getContext('webgl');

        if (!gl) {
            console.log('WebGL not supported');
        } else {
            // Attempt to trigger uninitialized memory read via specific shader compilation
            // This is a simplified representation of the exploit logic
            const shaderSource = `
                precision mediump float;
                void main() {
                    gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0);
                }
            `;
            
            const shader = gl.createShader(gl.FRAGMENT_SHADER);
            gl.shaderSource(shader, shaderSource);
            gl.compileShader(shader);
            
            if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
                console.error('Shader compile error:', gl.getShaderInfoLog(shader));
            } else {
                // Trigger rendering that may expose uninitialized memory
                const program = gl.createProgram();
                gl.attachShader(program, shader);
                gl.linkProgram(program);
                gl.useProgram(program);
                // Further specific ANGLE API calls required to hit the vulnerability
            }
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9944
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9944
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9944/
[4] VulDB https://vuldb.com/cve/CVE-2026-9944
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/503471286

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9944", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:52.540", "lastModified": "2026-05-29T18:17:16.170", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Uninitialized Use in ANGLE in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process 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:H/PR:N/UI:R/S:U/C:L/I:N/A:N", "baseScore": 3.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-457"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/503471286", "source": "[email protected]"}]}}