{"id":"CVE-2026-0331","kind":"vulnerability","aliases":["CVE-2026-0331"],"related":[],"title":"PAN-OS: unauthenticated traffic leaks firewall and session information to attackers","description":"An information disclosure vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated remote attacker with network access  to obtain sensitive firewall and session information by sending traffic to or through a dataplane interface.\n\n\n\nPanorama is not affected by this vulnerability.","summary":"A flaw in PAN-OS, the operating system of Palo Alto Networks firewalls, lets an unauthenticated remote attacker with network access obtain sensitive firewall and session information by sending traffic to or through a dataplane interface. Panorama, the central management product, is not affected.","severity":"medium","cvss":6.6,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["firewall","infrastructure","palo-alto-networks","pan-os"],"not_affected_if":["no-exposed-dataplane","panorama-only"],"how_to_check":"- Confirm the firewall runs PAN-OS by checking the version in the web interface or with `show system info` over SSH\n- Compare the running PAN-OS version against the affected ranges in the vendor advisory\n- Check whether the dataplane interfaces are reachable from untrusted networks","fix":null,"status":"open","published_at":"2026-11-11T20:17:04+00:00","first_seen_at":"2026-11-11T20:28:52+00:00","triaged_at":"2026-11-11T20:30:13+00:00","updated_at":"2026-11-11T20:30:13+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-11T20:30:13Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"PAN-OS: unauthenticated traffic leaks firewall and session information to attackers","impact":"low","summary":"A flaw in PAN-OS, the operating system of Palo Alto Networks firewalls, lets an unauthenticated remote attacker with network access obtain sensitive firewall and session information by sending traffic to or through a dataplane interface. Panorama, the central management product, is not affected.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["pan-os","palo-alto-networks","firewall"],"confidence":0.6,"fix_status":"unknown","needs_auth":"no","worst_case":"attacker reads sensitive firewall and session information remotely","analyst_note":"Find the vendor advisory for CVE-2026-0331 on the Palo Alto Networks security advisories page to get affected and fixed PAN-OS versions and any mitigation settings.","how_to_check":"- Confirm the firewall runs PAN-OS by checking the version in the web interface or with `show system info` over SSH\n- Compare the running PAN-OS version against the affected ranges in the vendor advisory\n- Check whether the dataplane interfaces are reachable from untrusted networks","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["panorama-only","no-exposed-dataplane"],"who_is_affected":"Organizations running PAN-OS firewalls whose dataplane interfaces accept traffic from untrusted networks are exposed. Panorama management appliances are not affected according to the description. Teams without PAN-OS firewalls can skip it.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000754,"input_tokens":4552,"output_tokens":597,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-0331':15A,18A '-2026':14A,17A 'access':49B,92C 'affect':72B,112C 'alto':23B,39B,79C 'attack':12A,46B,89C 'central':67B 'cve':13A,16A 'dataplan':63B,107C 'disclosur':75C 'enabl':85C 'firewal':7A,19B,41B,52B,96C 'flaw':29B 'inform':10A,55B,74C,99C 'infrastructur':20B 'interfac':64B,108C 'leak':6A 'let':42B 'manag':68B 'network':24B,40B,48B,80C,91C 'obtain':50B,94C 'oper':35B 'os':3A,27B,33B,83C 'palo':22B,38B,78C 'palo-alto-network':21B 'pan':2A,26B,32B,82C 'pan-o':1A,25B,31B,81C 'panorama':65B,109C 'product':69B 'remot':45B,88C 'send':57B,101C 'sensit':51B,95C 'session':9A,54B,98C 'softwar':84C 'system':36B 'traffic':5A,58B,102C 'unauthent':4A,44B,87C 'vulner':76C,115C","nicknames":[],"mitigations":[],"who_affected":"Organizations running PAN-OS firewalls whose dataplane interfaces accept traffic from untrusted networks are exposed. Panorama management appliances are not affected according to the description. Teams without PAN-OS firewalls can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["firewall","infrastructure","medium","paloaltonetworks","panos"],"campaign_type":null,"search_a":"'-0331':15A,18A '-2026':14A,17A 'attack':12A 'cve':13A,16A 'firewal':7A 'inform':10A 'leak':6A 'os':3A 'pan':2A 'pan-o':1A 'session':9A 'traffic':5A 'unauthent':4A","search_b":"'access':49B 'affect':72B 'alto':23B,39B 'attack':46B 'central':67B 'dataplan':63B 'firewal':19B,41B,52B 'flaw':29B 'inform':55B 'infrastructur':20B 'interfac':64B 'let':42B 'manag':68B 'network':24B,40B,48B 'obtain':50B 'oper':35B 'os':27B,33B 'palo':22B,38B 'palo-alto-network':21B 'pan':26B,32B 'pan-o':25B,31B 'panorama':65B 'product':69B 'remot':45B 'send':57B 'sensit':51B 'session':54B 'system':36B 'traffic':58B 'unauthent':44B","search_c":"'access':92C 'affect':112C 'alto':79C 'attack':89C 'dataplan':107C 'disclosur':75C 'enabl':85C 'firewal':96C 'inform':74C,99C 'interfac':108C 'network':80C,91C 'obtain':94C 'os':83C 'palo':78C 'pan':82C 'pan-o':81C 'panorama':109C 'remot':88C 'send':101C 'sensit':95C 'session':98C 'softwar':84C 'traffic':102C 'unauthent':87C 'vulner':76C,115C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T20:17:04+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Amber","cvss_by":"psirt@paloaltonetworks.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-0331","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0331","severity":null,"published_at":"2026-11-11T20:17:04+00:00","modified_at":"2026-11-11T20:17:04+00:00","first_seen_at":"2026-11-11T20:28:52+00:00","fetched_at":"2026-11-11T20:28:52+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}