CVE-2026-9999

Description

Inappropriate implementation in ANGLE in Google Chrome on Mac prior to 148.0.7778.216 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 for Mac < 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-2026-9999 (Conceptual)
  This HTML page attempts to trigger the ANGLE implementation issue
  via WebGL rendering context manipulation.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9999 PoC</title>
</head>
<body>
    <h1>ANGLE Vulnerability Test</h1>
    <canvas id="glcanvas" width="640" height="480"></canvas>
    <script>
        const canvas = document.getElementById('glcanvas');
        // Attempt to get a WebGL context
        const gl = canvas.getContext('webgl');

        if (!gl) {
            console.log('Unable to initialize WebGL.');
        } else {
            console.log('WebGL initialized successfully.');
            
            // Malicious shader code to trigger the implementation flaw
            // This is a placeholder representing the crafted HTML content
            const vsSource = `
                attribute vec4 aVertexPosition;
                void main() {
                    gl_Position = aVertexPosition;
                }
            `;
            
            const fsSource = `
                void main() {
                    gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
                }
            `;
            
            // Compile and link shaders (simulation of exploit trigger)
            const vertexShader = gl.createShader(gl.VERTEX_SHADER);
            gl.shaderSource(vertexShader, vsSource);
            gl.compileShader(vertexShader);
            
            const fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
            gl.shaderSource(fragmentShader, fsSource);
            gl.compileShader(fragmentShader);
            
            const shaderProgram = gl.createProgram();
            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.');
            }
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9999
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9999
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9999/
[4] VulDB https://vuldb.com/cve/CVE-2026-9999
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/513364480

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9999", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:58.140", "lastModified": "2026-05-29T18:17:18.940", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Inappropriate implementation in ANGLE in Google Chrome on Mac prior to 148.0.7778.216 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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-269"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/513364480", "source": "[email protected]"}]}}