{"id":"GHSA-f525-44xv-f2qj","aliases":["BIT-tomcat-2026-65637","CVE-2026-65637"],"title":"Apache Tomcat - HTTP/2 no-authority bypass of strict SNI validation","description":"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issue.","severity":"critical","score":9.8,"published":"2026-08-26T00:30:52.000Z","modified":"2026-10-27T15:10:58.130Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-coyote","ranges":[{"events":[{"introduced":"11.0.20"},{"fixed":"11.0.25"}],"type":"ECOSYSTEM"}],"versions":["11.0.20","11.0.21","11.0.22","11.0.23","11.0.24"],"fixed":["11.0.25"]},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-coyote","ranges":[{"events":[{"introduced":"10.1.53"},{"fixed":"10.1.59"}],"type":"ECOSYSTEM"}],"versions":["10.1.53","10.1.54","10.1.55","10.1.56","10.1.57"],"fixed":["10.1.59"]},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-coyote","ranges":[{"events":[{"introduced":"9.0.115"},{"fixed":"9.0.121"}],"type":"ECOSYSTEM"}],"versions":["9.0.115","9.0.116","9.0.117","9.0.118","9.0.119","9.0.120"],"fixed":["9.0.121"]},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","ranges":[{"events":[{"introduced":"11.0.20"},{"fixed":"11.0.25"}],"type":"ECOSYSTEM"}],"versions":["11.0.20","11.0.21","11.0.22","11.0.23","11.0.24"],"fixed":["11.0.25"]},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","ranges":[{"events":[{"introduced":"10.1.53"},{"fixed":"10.1.59"}],"type":"ECOSYSTEM"}],"versions":["10.1.53","10.1.54","10.1.55","10.1.56","10.1.57"],"fixed":["10.1.59"]},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","ranges":[{"events":[{"introduced":"9.0.115"},{"fixed":"9.0.121"}],"type":"ECOSYSTEM"}],"versions":["9.0.115","9.0.116","9.0.117","9.0.118","9.0.119","9.0.120"],"fixed":["9.0.121"]}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-65637","https://github.com/apache/tomcat/commit/40012414df828a56126f76a7339669c7c919aae7","https://github.com/apache/tomcat/commit/8639b20f045c88f356b887204f52e897399f0de7","https://github.com/apache/tomcat/commit/b823e88da077f5fa973e34d72359bded9f621e3c","https://github.com/apache/tomcat","https://github.com/apache/tomcat/releases/tag/10.1.58","https://github.com/apache/tomcat/releases/tag/11.0.25","https://github.com/apache/tomcat/releases/tag/9.0.121","https://lists.apache.org/thread/djog953z1ohsyt25bdvhfzbmsy22vgcj","https://tomcat.apache.org/security-10.html","https://tomcat.apache.org/security-11.html","https://tomcat.apache.org/security-9.html"],"sources":[{"name":"OSV","id":"GHSA-f525-44xv-f2qj","modified":"2026-10-27T15:10:58.130507578Z","url":"https://osv.dev/vulnerability/GHSA-f525-44xv-f2qj"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8}]}