{"id":"GHSA-f525-44xv-f2qj","summary":"Apache Tomcat - HTTP/2 no-authority bypass of strict SNI validation","details":"Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990.\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\nUsers are recommended to upgrade to version 11.0.25, 10.1.59 or 9.0.121, which fix the issue.","aliases":["BIT-tomcat-2026-65637","CVE-2026-65637"],"modified":"2026-10-27T15:10:58.130507578Z","published":"2026-08-26T00:30:52Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-10-27T14:45:10Z","nvd_published_at":"2026-08-25T22:17:05Z","cwe_ids":["CWE-20"],"severity":"CRITICAL"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65637"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/40012414df828a56126f76a7339669c7c919aae7"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/8639b20f045c88f356b887204f52e897399f0de7"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/b823e88da077f5fa973e34d72359bded9f621e3c"},{"type":"PACKAGE","url":"https://github.com/apache/tomcat"},{"type":"WEB","url":"https://github.com/apache/tomcat/releases/tag/10.1.58"},{"type":"WEB","url":"https://github.com/apache/tomcat/releases/tag/11.0.25"},{"type":"WEB","url":"https://github.com/apache/tomcat/releases/tag/9.0.121"},{"type":"WEB","url":"https://lists.apache.org/thread/djog953z1ohsyt25bdvhfzbmsy22vgcj"},{"type":"WEB","url":"https://tomcat.apache.org/security-10.html"},{"type":"WEB","url":"https://tomcat.apache.org/security-11.html"},{"type":"WEB","url":"https://tomcat.apache.org/security-9.html"}],"affected":[{"package":{"name":"org.apache.tomcat:tomcat-coyote","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"11.0.20"},{"fixed":"11.0.25"}]}],"versions":["11.0.20","11.0.21","11.0.22","11.0.23","11.0.24"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-f525-44xv-f2qj/GHSA-f525-44xv-f2qj.json"}},{"package":{"name":"org.apache.tomcat:tomcat-coyote","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"10.1.53"},{"fixed":"10.1.59"}]}],"versions":["10.1.53","10.1.54","10.1.55","10.1.56","10.1.57"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-f525-44xv-f2qj/GHSA-f525-44xv-f2qj.json","last_known_affected_version_range":"\u003c= 10.1.57"}},{"package":{"name":"org.apache.tomcat:tomcat-coyote","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.115"},{"fixed":"9.0.121"}]}],"versions":["9.0.115","9.0.116","9.0.117","9.0.118","9.0.119","9.0.120"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-f525-44xv-f2qj/GHSA-f525-44xv-f2qj.json"}},{"package":{"name":"org.apache.tomcat.embed:tomcat-embed-core","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"11.0.20"},{"fixed":"11.0.25"}]}],"versions":["11.0.20","11.0.21","11.0.22","11.0.23","11.0.24"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-f525-44xv-f2qj/GHSA-f525-44xv-f2qj.json"}},{"package":{"name":"org.apache.tomcat.embed:tomcat-embed-core","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"10.1.53"},{"fixed":"10.1.59"}]}],"versions":["10.1.53","10.1.54","10.1.55","10.1.56","10.1.57"],"database_specific":{"last_known_affected_version_range":"\u003c= 10.1.57","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-f525-44xv-f2qj/GHSA-f525-44xv-f2qj.json"}},{"package":{"name":"org.apache.tomcat.embed:tomcat-embed-core","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.115"},{"fixed":"9.0.121"}]}],"versions":["9.0.115","9.0.116","9.0.117","9.0.118","9.0.119","9.0.120"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-f525-44xv-f2qj/GHSA-f525-44xv-f2qj.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}