{"id":"CVE-2026-65637","published":"2026-08-25T21:49:13Z","modified":"2026-08-26T15:20:30Z","title":"Apache Tomcat: HTTP/2 no-authority bypass of strict SNI validation - CVE-2026-32990 fix incomplete","vendor":"Apache","product":"Apache Tomcat","tier":"tail","description":{"text":"Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.20 through 11.0.24, from 10.1.53 through 10.1.57, from 9.0.115 through 9.0.120.\n\n\n\nUsers are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.","provenance":"source","from":"CVE.org"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"CISA ADP Vulnrichment"},"epss":{"score":0.00751,"percentile":0.54996,"provenance":"source"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"references":[{"url":"https://lists.apache.org/thread/djog953z1ohsyt25bdvhfzbmsy22vgcj","tags":["vendor-advisory"]}],"priority":{"score":17.9,"factors":[{"name":"EPSS percentile","points":11.0},{"name":"CVSS severity","points":6.86}]},"vendorSlug":"apache","affectedVersions":[{"vendor":"Apache Software Foundation","product":"Apache Tomcat","versions":[">= 11.0.20, <= 11.0.24",">= 10.1.53, <= 10.1.57",">= 9.0.115, <= 9.0.120"]}],"affected":[{"ecosystem":"Maven","package":"org.apache.tomcat:tomcat-coyote","vulnerableRanges":[">=11.0.20, <11.0.25",">=10.1.53, <10.1.59",">=9.0.115, <9.0.121"],"patched":["11.0.25","10.1.59","9.0.121"],"from":["GHSA-f525-44xv-f2qj"],"provenance":"source"},{"ecosystem":"Maven","package":"org.apache.tomcat.embed:tomcat-embed-core","vulnerableRanges":[">=11.0.20, <11.0.25",">=10.1.53, <10.1.59",">=9.0.115, <9.0.121"],"patched":["11.0.25","10.1.59","9.0.121"],"from":["GHSA-f525-44xv-f2qj"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-66127","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-apache-tomcat-cve-2025-66614","parents":[{"from":"CVE-2026-32990","to":"CVE-2026-65637","relation":"incomplete-fix","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"incomplete-fix","quote":"Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990.","from":"CVE.org","in":"CVE-2026-65637"},{"kind":"similar","provenance":"machine","score":1.0,"basis":"same product + CWE + description similarity"}]}],"packageHistory":[{"cve":"CVE-2026-29129","published":"2026-04-09","fixed":"11.0.20","kev":false},{"cve":"CVE-2026-32990","published":"2026-04-09","fixed":"11.0.20","kev":false},{"cve":"CVE-2026-41293","published":"2026-05-12","fixed":"11.0.22","kev":false,"link":{"from":"CVE-2026-41293","to":"CVE-2026-65637","relation":"successor","confidence":"low","kind":"sequence","evidence":[{"kind":"version-step","provenance":"source","package":"Maven:org.apache.tomcat:tomcat-coyote","fromFixed":"9.0.118","toFixed":"9.0.121","daysApart":105},{"kind":"version-step","provenance":"source","package":"Maven:org.apache.tomcat:tomcat-coyote","fromFixed":"10.1.55","toFixed":"10.1.59","daysApart":105}]}},{"cve":"CVE-2026-65637","published":"2026-08-25","fixed":"11.0.25","kev":false}],"package":"Maven:org.apache.tomcat:tomcat-coyote"}}