{"id":"CVE-2026-65637","aliases":["BIT-tomcat-2026-65637","GHSA-f525-44xv-f2qj"],"url":"https://o3.security/vulnerability/CVE-2026-65637","summary":"Apache Tomcat: HTTP/2 no-authority bypass of strict SNI validation - CVE-2026-32990 fix incomplete","details":"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.","published":"2026-08-25T21:49:13.127Z","modified":"2026-10-27T15:10:58.130507578Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.00754,"percentile":0.53055,"asOf":"2026-09-13"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-coyote","fixedVersion":"11.0.25"},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-coyote","fixedVersion":"10.1.59"},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-coyote","fixedVersion":"9.0.121"},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"11.0.25"},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"10.1.59"},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"9.0.121"}],"fix":{"url":"https://github.com/apache/tomcat/commit/40012414df828a56126f76a7339669c7c919aae7","label":"apache/tomcat@4001241"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65637.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/djog953z1ohsyt25bdvhfzbmsy22vgcj"},{"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://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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-27T15:10:58.130507578Z"}}