CVE-2026-7363

Description

Use after free in Canvas in Google Chrome on Linux, ChromeOS prior to 147.0.7727.138 allowed a remote attacker to execute arbitrary code inside a sandbox 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 < 147.0.7727.138 (Linux)

Google Chrome < 147.0.7727.138 (ChromeOS)

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC for CVE-2026-7363 (Conceptual Use After Free in Canvas)
This code attempts to trigger a UAF condition by manipulating canvas objects.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-7363 PoC</title>
</head>
<body>
    <canvas id="target" width="800" height="600"></canvas>
    <script>
        // Attempt to trigger UAF in Canvas implementation
        const canvas = document.getElementById('target');
        const ctx = canvas.getContext('2d');

        // Create a complex object pattern to stress memory management
        const objects = [];
        for (let i = 0; i < 1000; i++) {
            objects.push({ data: new ArrayBuffer(0x1000) });
        }

        // Simulate the vulnerability trigger sequence
        // Specific API calls depend on the exact patch diff
        try {
            ctx.fillStyle = 'rgba(0,0,0,0.1)';
            ctx.fillRect(0, 0, 100, 100);
            
            // Hypothetical trigger: clearing context while holding references
            // In a real exploit, this would involve precise heap grooming
            const potentialUAF = ctx.getImageData(0, 0, 1, 1);
            
            // Force Garbage Collection if possible (implementation dependent)
            if (window.gc) window.gc();

            // Access the potentially freed object
            console.log(potentialUAF.data[0]); 
        } catch (e) {
            console.log("Exception caught: " + e);
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-7363
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-7363
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-7363/
[4] VulDB https://vuldb.com/cve/CVE-2026-7363
[5] https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_28.html
[6] https://issues.chromium.org/issues/494352590

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-7363", "sourceIdentifier": "[email protected]", "published": "2026-04-28T23:16:23.773", "lastModified": "2026-04-30T16:37:25.387", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Canvas in Google Chrome on Linux, ChromeOS prior to 147.0.7727.138 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: Critical)"}], "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-416"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "147.0.7727.138", "matchCriteriaId": "162EE53D-80A0-4153-B6D6-B2EF01E0BDAE"}]}, {"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/2026/04/stable-channel-update-for-desktop_28.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/494352590", "source": "[email protected]", "tags": ["Permissions Required"]}]}}