{"id":"CVE-2026-117477","kind":"vulnerability","aliases":["CVE-2026-117477"],"related":[],"title":"KUSANAGI: crafted URL lets attackers inject HTTP response headers","description":"KUSANAGI provided by GMO Prime Strategy Co., Ltd. contains an HTTP header injection vulnerability that may allow arbitrary HTTP headers to be injected into the HTTP response when a user accesses a specially crafted URL.","summary":"KUSANAGI, a web server stack from GMO Prime Strategy, has an HTTP header injection flaw. A user who opens a specially crafted URL can have arbitrary HTTP headers added to the response.","severity":"medium","cvss":6.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["kusanagi","other"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T00:17:05+00:00","first_seen_at":"2026-11-10T00:28:41+00:00","triaged_at":"2026-11-10T00:30:19+00:00","updated_at":"2026-11-10T00:30:19+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-10T00:30:19Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"KUSANAGI: crafted URL lets attackers inject HTTP response headers","impact":"medium","summary":"KUSANAGI, a web server stack from GMO Prime Strategy, has an HTTP header injection flaw. A user who opens a specially crafted URL can have arbitrary HTTP headers added to the response.","audience":"businesses","category":"other","nicknames":[],"who_cares":["kusanagi"],"confidence":0.5,"fix_status":"unknown","needs_auth":"no","worst_case":"Attacker injects arbitrary HTTP headers into responses served to users","analyst_note":"Find the vendor advisory or JVN entry for KUSANAGI to confirm affected versions, fixed versions and whether a default configuration is exposed.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000637,"input_tokens":4527,"output_tokens":368,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-117477':12A,15A '-2026':11A,14A 'access':79C 'add':45B 'allow':65C 'arbitrari':42B,66C 'attack':5A 'co':55C 'contain':57C 'craft':2A,38B,82C 'cve':10A,13A 'flaw':31B 'gmo':23B,52C 'header':9A,29B,44B,60C,68C 'http':7A,28B,43B,59C,67C,74C 'inject':6A,30B,61C,71C 'kusanagi':1A,16B,17B,49C 'let':4A 'ltd':56C 'may':64C 'open':35B 'prime':24B,53C 'provid':50C 'respons':8A,48B,75C 'server':20B 'special':37B,81C 'stack':21B 'strategi':25B,54C 'url':3A,39B,83C 'user':33B,78C 'vulner':62C 'web':19B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["kusanagi","medium","other"],"campaign_type":null,"search_a":"'-117477':12A,15A '-2026':11A,14A 'attack':5A 'craft':2A 'cve':10A,13A 'header':9A 'http':7A 'inject':6A 'kusanagi':1A 'let':4A 'respons':8A 'url':3A","search_b":"'add':45B 'arbitrari':42B 'craft':38B 'flaw':31B 'gmo':23B 'header':29B,44B 'http':28B,43B 'inject':30B 'kusanagi':16B,17B 'open':35B 'prime':24B 'respons':48B 'server':20B 'special':37B 'stack':21B 'strategi':25B 'url':39B 'user':33B 'web':19B","search_c":"'access':79C 'allow':65C 'arbitrari':66C 'co':55C 'contain':57C 'craft':82C 'gmo':52C 'header':60C,68C 'http':59C,67C,74C 'inject':61C,71C 'kusanagi':49C 'ltd':56C 'may':64C 'prime':53C 'provid':50C 'respons':75C 'special':81C 'strategi':54C 'url':83C 'user':78C 'vulner':62C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T00:17:05+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/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:X/R:X/V:X/RE:X/U:X","cvss_by":"vultures@jpcert.or.jp","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-117477","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-117477","severity":null,"published_at":"2026-11-10T00:17:05+00:00","modified_at":"2026-11-10T00:17:05+00:00","first_seen_at":"2026-11-10T00:28:41+00:00","fetched_at":"2026-11-10T00:28:41+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"}