CVE-2026-4677

Description

Inappropriate implementation in WebAudio in Google Chrome prior to 146.0.7680.165 allowed a remote attacker to perform an out of bounds memory read 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 < 146.0.7680.165

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- PoC for CVE-2026-4677: WebAudio Out-of-Bounds Read -->
<!-- This is a conceptual example demonstrating how to trigger WebAudio processing -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-4677 PoC</title>
</head>
<body>
    <script>
        // Create an AudioContext
        const audioCtx = new (window.AudioContext || window.webkitAudioContext)();
        
        try {
            // Attempt to create a buffer with specific parameters to hit the vulnerable code path
            // Note: Exact parameters may vary based on the specific bug details
            const bufferSize = 4096;
            const buffer = audioCtx.createBuffer(1, bufferSize, 48000);
            
            // Fill buffer with data
            const data = buffer.getChannelData(0);
            for (let i = 0; i < bufferSize; i++) {
                data[i] = i;
            }
            
            // Create source and connect
            const source = audioCtx.createBufferSource();
            source.buffer = buffer;
            source.connect(audioCtx.destination);
            
            // Start playback to trigger processing
            source.start(0);
            
            console.log("[+] PoC executed. If browser crashes or behaves unexpectedly, it may be vulnerable.");
        } catch (e) {
            console.error("[-] PoC execution failed:", e);
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-4677
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-4677
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-4677/
[4] VulDB https://vuldb.com/cve/CVE-2026-4677
[5] https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_23.html
[6] https://issues.chromium.org/issues/490533968

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-4677", "sourceIdentifier": "[email protected]", "published": "2026-03-24T01:17:03.343", "lastModified": "2026-03-24T16:47:49.867", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Inappropriate implementation in WebAudio in Google Chrome prior to 146.0.7680.165 allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page. (Chromium security severity: High)"}, {"lang": "es", "value": "Implementación inapropiada en WebAudio en Google Chrome anterior a 146.0.7680.165 permitió a un atacante remoto realizar una lectura de memoria fuera de límites a través de una página HTML manipulada. (Gravedad de seguridad de Chromium: Alta)"}], "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-125"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "146.0.7680.164", "matchCriteriaId": "2570A6D2-95CF-4CB3-A7D1-8CC6532A05FA"}]}, {"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_23.html", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/490533968", "source": "[email protected]", "tags": ["Permissions Required"]}]}}