CVE-2026-8512

Description

Use after free in FileSystem in Google Chrome prior to 148.0.7778.168 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

CVSS Details

CVSS Score

8.3

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/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

<!--
PoC for CVE-2026-8512: Chrome FileSystem Use-After-Free
This HTML page demonstrates the trigger context requiring user interaction.
Actual exploitation requires precise heap grooming and ROP chains.
-->
<html>
<head><title>CVE-2026-8512 PoC</title></head>
<body>
<h3>Click the button to trigger the vulnerability simulation</h3>
<button id="btn">Interact</button>
<script>
  document.getElementById('btn').addEventListener('click', function() {
    try {
      // Simulating the environment where the UAF occurs in FileSystem
      if (window.webkitRequestFileSystem) {
        window.webkitRequestFileSystem(window.TEMPORARY, 1024, function(fs) {
          console.log("FileSystem initialized.");
          // Vulnerability trigger logic would be placed here
          // involving object reuse after free.
        }, function(e) { console.log(e); });
      }
    } catch (e) {
      console.log("Exception caught: " + e.message);
    }
  });
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8512
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8512
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8512/
[4] VulDB https://vuldb.com/cve/CVE-2026-8512
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
[6] https://issues.chromium.org/issues/495782021

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8512", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:11.830", "lastModified": "2026-05-14T22:16:45.417", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in FileSystem in Google Chrome prior to 148.0.7778.168 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)"}], "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:C/C:H/I:H/A:H", "baseScore": 8.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.6, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/495782021", "source": "[email protected]"}]}}