CVE-2026-8003

Description

Insufficient validation of untrusted input in TabGroups in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to perform UI spoofing via malicious network traffic. (Chromium security severity: Low)

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:N/A:L

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

<!-- Conceptual PoC for UI Spoofing -->
<html>
<head><title>PoC</title></head>
<body>
<script>
// Simulate UI Spoofing by creating a fake browser tab overlay
// Attackers would exploit the TabGroups validation flaw to render this
const fakeTab = document.createElement('div');
fakeTab.style.position = 'fixed';
fakeTab.style.top = '0';
fakeTab.style.left = '10%';
fakeTab.style.width = '80%';
fakeTab.style.height = '30px';
fakeTab.style.backgroundColor = '#ddd';
fakeTab.style.border = '1px solid #999';
fakeTab.style.zIndex = '9999';
fakeTab.innerText = 'https://www.google.com - Secure';
document.body.appendChild(fakeTab);
console.log('Fake UI element injected');
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8003
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8003
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8003/
[4] VulDB https://vuldb.com/cve/CVE-2026-8003
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/495985532

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8003", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:51.290", "lastModified": "2026-05-07T14:00:54.447", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in TabGroups in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to perform UI spoofing via malicious network traffic. (Chromium security severity: Low)"}], "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:L", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "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/495985532", "source": "[email protected]", "tags": ["Permissions Required"]}]}}