CVE-2026-8004

// manifest.json - Conceptual PoC for CVE-2026-8004 { "manifest_version": 3, "name": "DevTools Data Leak PoC", "version": "1.0", "permissions": ["activeTab", "scripting"], "background": { "service_worker": "background.js" } } // background.js - Conceptual exploitation logic // This script attempts to leverage insufficient policy enforcement in DevTools // to leak cross-origin data. In a real scenario, specific DevTools APIs would be targeted. chrome.runtime.onInstalled.addListener(() => { console.log("PoC Extension Installed"); }); // Function to simulate the data leak attempt function attemptDataLeak(targetUrl) { // Hypothetical interaction with DevTools protocol which lacks strict policy checks // In the vulnerable version, this might bypass CORS restrictions. console.log(`Attempting to leak data from: ${targetUrl}`); // Note: Actual exploitation requires specific internal calls that are patched in later versions. // This represents the logic flow of the malicious extension. }

{"cve": {"id": "CVE-2026-8004", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:51.390", "lastModified": "2026-05-07T13:54:23.817", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient policy enforcement in DevTools in Google Chrome prior to 148.0.7778.96 allowed an attacker who convinced a user to install a malicious extension to leak cross-origin data 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: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": "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: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/496189510", "source": "[email protected]", "tags": ["Permissions Required"]}]}}