Security Vulnerability Report
中文
CVE-2026-6782 CVSS 7.5 HIGH

CVE-2026-6782

Published: 2026-04-21 13:16:24
Last Modified: 2026-04-22 15:18:15

Description

Information disclosure in the IP Protection component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

CVSS Details

CVSS Score
7.5
Severity
HIGH
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Configurations (Affected Products)

cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* - VULNERABLE
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:* - VULNERABLE
Mozilla Firefox < 150
Mozilla Thunderbird < 150

PoC / Exploit Code

⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
// Conceptual PoC for IP Disclosure in IP Protection // This script attempts to detect if the real IP is exposed via a potential vulnerable endpoint or WebRTC leak. async function checkIPLeak() { // 1. Fetch public IP via a standard STUN server (simulating IP Protection bypass) const rtc = new RTCPeerConnection({iceServers: [{urls: 'stun:stun.l.google.com:19302'}]}); rtc.onicecandidate = (event) => { if (event.candidate) { console.log("[+] Potential IP Leak detected via ICE Candidate:", event.candidate.candidate); // In a real scenario, compare this with the expected protected IP } }; // 2. Create a data channel to trigger candidate gathering const dc = rtc.createDataChannel('test'); const offer = await rtc.createOffer(); await rtc.setLocalDescription(offer); // 3. Alternative: Check specific headers if the vulnerability is in HTTP request handling fetch('https://api.ipify.org?format=json') .then(response => response.json()) .then(data => { console.log("[+] External IP detected:", data.ip); console.log("[*] Verify if this IP matches the expected IP Protection proxy IP."); }); } checkIPLeak();

References

Raw JSON Data

JSON
{"cve": {"id": "CVE-2026-6782", "sourceIdentifier": "[email protected]", "published": "2026-04-21T13:16:23.847", "lastModified": "2026-04-22T15:18:14.977", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Information disclosure in the IP Protection component. This vulnerability was fixed in Firefox 150 and Thunderbird 150."}], "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:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-200"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "versionEndExcluding": "150.0", "matchCriteriaId": "67B01D49-66FA-4C76-9EB4-2B8CD61FBEB2"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*", "versionEndExcluding": "150.0", "matchCriteriaId": "5DDDA58D-2B1E-4956-9CC2-45B3017F3F0B"}]}]}], "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2026571", "source": "[email protected]", "tags": ["Permissions Required"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-30/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-33/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}