CVE-2026-9953

Description

Out of bounds read in ANGLE in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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 (Proof of Concept) for CVE-2026-9953
This is a generic template for triggering an Out-of-Bounds Read in WebGL/ANGLE.
Actual exploitation requires specific shader manipulation based on the internal bug.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9953 PoC</title>
</head>
<body>
    <h1>Testing ANGLE OOB Read</h1>
    <canvas id="glCanvas" width="640" height="480"></canvas>
    <script>
        const canvas = document.getElementById('glCanvas');
        const gl = canvas.getContext('webgl');

        if (!gl) {
            console.log('WebGL not supported');
        } else {
            // Vertex Shader source
            const vsSource = `
                attribute vec4 aVertexPosition;
                void main() {
                    gl_Position = aVertexPosition;
                }
            `;

            // Fragment Shader source (Simulating potential trigger)
            // Malicious manipulation of array indices or texture coordinates could trigger OOB
            const fsSource = `
                precision mediump float;
                void main() {
                    // This represents where the vulnerability logic would reside
                    gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
                }
            `;

            // Shader compilation helper function
            function loadShader(gl, type, source) {
                const shader = gl.createShader(type);
                gl.shaderSource(shader, source);
                gl.compileShader(shader);
                if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
                    console.error('An error occurred compiling the shaders: ' + gl.getShaderInfoLog(shader));
                    gl.deleteShader(shader);
                    return null;
                }
                return shader;
            }

            const shaderProgram = gl.createProgram();
            const vertexShader = loadShader(gl, gl.VERTEX_SHADER, vsSource);
            const fragmentShader = loadShader(gl, gl.FRAGMENT_SHADER, fsSource);

            gl.attachShader(shaderProgram, vertexShader);
            gl.attachShader(shaderProgram, fragmentShader);
            gl.linkProgram(shaderProgram);

            if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
                console.error('Unable to initialize the shader program: ' + gl.getProgramInfoLog(shaderProgram));
            }

            // Rendering attempt to trigger the path
            gl.useProgram(shaderProgram);
            // Further specific buffer manipulation would go here to exploit the bug
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9953
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9953
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9953/
[4] VulDB https://vuldb.com/cve/CVE-2026-9953
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/503985322

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9953", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:53.470", "lastModified": "2026-05-29T18:17:16.517", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds read in ANGLE in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to obtain potentially sensitive information from process memory 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:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/503985322", "source": "[email protected]"}]}}