CVE-2026-9987

Description

Insufficient validation of untrusted input in WebAppInstalls in Google Chrome on Android prior to 148.0.7778.216 allowed a local attacker to execute arbitrary code via a malicious file. (Chromium security severity: High)

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Google Chrome on Android < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- PoC for CVE-2026-9987: WebAppInstalls Insufficient Validation -->
<!-- This PoC demonstrates a potential trigger for the vulnerability -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9987 PoC</title>
    <!-- Attempt to load a malicious manifest -->
    <link rel="manifest" href="malicious_manifest.json">
</head>
<body>
    <h1>Chrome WebApp Install PoC</h1>
    <script>
        // Script to potentially trigger the install prompt or handling
        window.addEventListener('beforeinstallprompt', (e) => {
            console.log('Install prompt triggered due to insufficient validation');
            // In a real exploit, malicious payload is executed here
            e.prompt();
        });
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9987
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9987
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9987/
[4] VulDB https://vuldb.com/cve/CVE-2026-9987
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/513046475

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9987", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:56.940", "lastModified": "2026-05-29T13:16:24.627", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in WebAppInstalls in Google Chrome on Android prior to 148.0.7778.216 allowed a local attacker to execute arbitrary code via a malicious file. (Chromium security severity: High)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/513046475", "source": "[email protected]"}]}}