{"id":"CVE-2026-111810","kind":"vulnerability","aliases":["CVE-2026-111810"],"related":[],"title":"Apache Traffic Server: crafted headers flood the diagnostic log","description":"Apache Traffic Server 9.2.15, 10.1.4 and 10.2.0 write one unthrottled diagnostic log line for every internal @ header they strip, so a request carrying many such headers makes the proxy write far more log data than the request contains.\n\n\n\nThis issue affects Apache Traffic Server: 9.2.15, 10.1.4, 10.2.0.\n\n\n\nUsers are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.","summary":"Apache Traffic Server writes one unthrottled log line for every internal @ header it strips from a request. A single request with many such headers makes the proxy write far more log data than the request itself contains.","severity":"high","cvss":8.7,"epss":0.00263,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apache-traffic-server","runtime","self-hosted"],"not_affected_if":["other-versions"],"how_to_check":null,"fix":"Upgrade to Apache Traffic Server 9.2.16, 10.1.5, or 10.2.1.","status":"open","published_at":"2026-10-21T20:17:22+00:00","first_seen_at":"2026-10-23T21:57:29+00:00","triaged_at":"2026-10-23T22:35:30+00:00","updated_at":"2026-10-24T13:15:54+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-23T22:35:30Z","model":"claude-haiku-5-5","output":{"fix":"Upgrade to Apache Traffic Server 9.2.16, 10.1.5, or 10.2.1.","reach":"internet","title":"Apache Traffic Server: crafted headers flood the diagnostic log","impact":"low","summary":"Apache Traffic Server writes one unthrottled log line for every internal @ header it strips from a request. A single request with many such headers makes the proxy write far more log data than the request itself contains.","category":"runtime","who_cares":["apache-traffic-server","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"Remote requests can fill log disk and degrade the proxy service","analyst_note":"","how_to_check":"unknown","needs_analyst":false,"not_affected_if":["other-versions"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000451,"input_tokens":2987,"output_tokens":305,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-111810':12A,15A '-2026':11A,14A '10.1.4':65C,106C '10.1.5':116C '10.2.0':67C,107C '10.2.1':118C '9.2.15':64C,105C '9.2.16':115C 'affect':101C 'apach':1A,17B,24B,61C,102C 'apache-traffic-serv':16B 'carri':83C 'contain':60B,98C 'craft':4A 'cve':10A,13A 'data':55B,94C 'diagnost':8A,71C 'everi':33B,75C 'far':52B,91C 'fix':120C 'flood':6A 'header':5A,35B,47B,77C,86C 'host':23B 'intern':34B,76C 'issu':100C,122C 'line':31B,73C 'log':9A,30B,54B,72C,93C 'make':48B,87C 'mani':45B,84C 'one':28B,69C 'proxi':50B,89C 'recommend':110C 'request':40B,43B,58B,82C,97C 'runtim':20B 'self':22B 'self-host':21B 'server':3A,19B,26B,63C,104C 'singl':42B 'strip':37B,79C 'traffic':2A,18B,25B,62C,103C 'unthrottl':29B,70C 'upgrad':112C 'user':108C 'version':114C 'write':27B,51B,68C,90C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-21T20:17:22+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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":"security@apache.org","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-111810","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111810","severity":null,"published_at":"2026-10-21T20:17:22+00:00","modified_at":"2026-10-23T22:16:55+00:00","first_seen_at":"2026-10-23T21:57:29+00:00","fetched_at":"2026-10-23T22:29:02+00:00","note":null},{"source":"epss","external_id":"CVE-2026-111810","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-111810","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T13:15:54+00:00","fetched_at":"2026-10-24T13:15:54+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}