{"id":"CVE-2026-93446","kind":"vulnerability","aliases":["CVE-2026-93446"],"related":[],"title":"Apache Tomcat: incomplete cleanup makes TLS 1.3 connections fail intermittently","description":"Incomplete cleanup vulnerability in Apache Tomcat could cause TLS 1.3 connections to fail intermittently.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0-M21 through 11.0.26, from 10.1.25 through 10.1.60, from 9.0.90 through 9.0.122.\n\n\n\nUsers are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue.","summary":"Apache Tomcat does not fully clean up state in its TLS 1.3 handling, so some connections fail intermittently. The sources describe a reliability failure and do not describe code execution or data exposure.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["java","runtime","self-hosted","tomcat"],"not_affected_if":["default-config"],"how_to_check":"- Check the Tomcat version with `catalina.sh version` and compare it to the affected ranges: 11.0.0-M21 through 11.0.26, 10.1.25 through 10.1.60, 9.0.90 through 9.0.122.\n- Look for intermittent TLS 1.3 handshake failures in the Tomcat access and error logs.","fix":"- Upgrade Apache Tomcat 11.x to `11.0.27`.\n- Upgrade Apache Tomcat 10.1.x to `10.1.61`.\n- Upgrade Apache Tomcat 9.0.x to `9.0.123`.","status":"open","published_at":"2026-10-20T14:17:04+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","triaged_at":"2026-10-25T05:04:45+00:00","updated_at":"2026-10-25T05:04:45+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-25T05:04:45Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade Apache Tomcat 11.x to `11.0.27`.\n- Upgrade Apache Tomcat 10.1.x to `10.1.61`.\n- Upgrade Apache Tomcat 9.0.x to `9.0.123`.","reach":"network","title":"Apache Tomcat: incomplete cleanup makes TLS 1.3 connections fail intermittently","impact":"low","summary":"Apache Tomcat does not fully clean up state in its TLS 1.3 handling, so some connections fail intermittently. The sources describe a reliability failure and do not describe code execution or data exposure.","category":"runtime","nicknames":[],"who_cares":["tomcat","java","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"Some TLS 1.3 connections fail intermittently, causing service disruption","analyst_note":"","how_to_check":"- Check the Tomcat version with `catalina.sh version` and compare it to the affected ranges: 11.0.0-M21 through 11.0.26, 10.1.25 through 10.1.60, 9.0.90 through 9.0.122.\n- Look for intermittent TLS 1.3 handshake failures in the Tomcat access and error logs.","needs_analyst":false,"not_affected_if":["default-config"],"who_is_affected":"Teams running Apache Tomcat in the affected version ranges that serve TLS 1.3 connections are affected. The sources describe intermittent connection failures, not a security bypass. Teams on versions outside the listed ranges can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000627,"input_tokens":3368,"output_tokens":581,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-93446':13A,16A '1.3':7A,34B,65C '10.1.25':81C '10.1.60':83C '10.1.61':96C '11.0.0':76C '11.0.26':79C '11.0.27':95C '9.0.122':87C '9.0.123':98C '9.0.90':85C 'affect':72C 'apach':1A,23B,60C,73C 'caus':63C 'clean':28B 'cleanup':4A,57C 'code':51B 'connect':8A,38B,66C 'could':62C 'cve':11A,14A 'data':54B 'describ':43B,50B 'execut':52B 'exposur':55B 'fail':9A,39B,68C 'failur':46B 'fix':100C 'fulli':27B 'handl':35B 'host':21B 'incomplet':3A,56C 'intermitt':10A,40B,69C 'issu':71C,102C 'java':17B 'm21':77C 'make':5A 'recommend':90C 'reliabl':45B 'runtim':18B 'self':20B 'self-host':19B 'sourc':42B 'state':30B 'tls':6A,33B,64C 'tomcat':2A,22B,24B,61C,74C 'upgrad':92C 'user':88C 'version':94C 'vulner':58C","nicknames":[],"mitigations":[],"who_affected":"Teams running Apache Tomcat in the affected version ranges that serve TLS 1.3 connections are affected. The sources describe intermittent connection failures, not a security bypass. Teams on versions outside the listed ranges can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T14:17:04+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-93446","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93446","severity":null,"published_at":"2026-10-20T14:17:04+00:00","modified_at":"2026-10-20T19:35:38+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","fetched_at":"2026-10-23T22:28:58+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"}