{"id":"UBUNTU-CVE-2026-24733","details":"Improper Input Validation vulnerability in Apache Tomcat. Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request using HTTP/0.9. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0.M1 through 9.0.112. Older, EOL versions are also affected. Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.","modified":"2026-05-20T16:24:48.057895684Z","published":"2026-02-17T19:21:00Z","upstream":["CVE-2026-24733"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-24733"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-24733"},{"type":"REPORT","url":"https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f"}],"affected":[{"package":{"name":"tomcat6","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/tomcat6?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.37-1","6.0.39-1","6.0.39-1ubuntu0.1","6.0.39-1ubuntu0.1+esm1","6.0.39-1ubuntu0.1+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"6.0.39-1ubuntu0.1+esm2","binary_name":"libservlet2.4-java"},{"binary_version":"6.0.39-1ubuntu0.1+esm2","binary_name":"libservlet2.5-java"},{"binary_version":"6.0.39-1ubuntu0.1+esm2","binary_name":"libtomcat6-java"},{"binary_version":"6.0.39-1ubuntu0.1+esm2","binary_name":"tomcat6"},{"binary_version":"6.0.39-1ubuntu0.1+esm2","binary_name":"tomcat6-admin"},{"binary_version":"6.0.39-1ubuntu0.1+esm2","binary_name":"tomcat6-common"},{"binary_version":"6.0.39-1ubuntu0.1+esm2","binary_name":"tomcat6-docs"},{"binary_version":"6.0.39-1ubuntu0.1+esm2","binary_name":"tomcat6-examples"},{"binary_version":"6.0.39-1ubuntu0.1+esm2","binary_name":"tomcat6-extras"},{"binary_version":"6.0.39-1ubuntu0.1+esm2","binary_name":"tomcat6-user"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-24733.json"}},{"package":{"name":"tomcat7","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/tomcat7?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.0.42-1","7.0.47-1","7.0.50-1","7.0.52-1","7.0.52-1ubuntu0.1","7.0.52-1ubuntu0.3","7.0.52-1ubuntu0.6","7.0.52-1ubuntu0.7","7.0.52-1ubuntu0.8","7.0.52-1ubuntu0.9","7.0.52-1ubuntu0.10","7.0.52-1ubuntu0.11","7.0.52-1ubuntu0.13","7.0.52-1ubuntu0.14","7.0.52-1ubuntu0.15","7.0.52-1ubuntu0.16","7.0.52-1ubuntu0.16+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"7.0.52-1ubuntu0.16+esm1","binary_name":"libservlet3.0-java"},{"binary_version":"7.0.52-1ubuntu0.16+esm1","binary_name":"libtomcat7-java"},{"binary_version":"7.0.52-1ubuntu0.16+esm1","binary_name":"tomcat7"},{"binary_version":"7.0.52-1ubuntu0.16+esm1","binary_name":"tomcat7-admin"},{"binary_version":"7.0.52-1ubuntu0.16+esm1","binary_name":"tomcat7-common"},{"binary_version":"7.0.52-1ubuntu0.16+esm1","binary_name":"tomcat7-docs"},{"binary_version":"7.0.52-1ubuntu0.16+esm1","binary_name":"tomcat7-examples"},{"binary_version":"7.0.52-1ubuntu0.16+esm1","binary_name":"tomcat7-user"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-24733.json"}},{"package":{"name":"tomcat8","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/tomcat8?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.0.26-1","8.0.28-1","8.0.30-1","8.0.32-1","8.0.32-1ubuntu1","8.0.32-1ubuntu1.1","8.0.32-1ubuntu1.2","8.0.32-1ubuntu1.3","8.0.32-1ubuntu1.4","8.0.32-1ubuntu1.5","8.0.32-1ubuntu1.6","8.0.32-1ubuntu1.7","8.0.32-1ubuntu1.8","8.0.32-1ubuntu1.9","8.0.32-1ubuntu1.10","8.0.32-1ubuntu1.11","8.0.32-1ubuntu1.13","8.0.32-1ubuntu1.13+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"8.0.32-1ubuntu1.13+esm1","binary_name":"libservlet3.1-java"},{"binary_version":"8.0.32-1ubuntu1.13+esm1","binary_name":"libtomcat8-java"},{"binary_version":"8.0.32-1ubuntu1.13+esm1","binary_name":"tomcat8"},{"binary_version":"8.0.32-1ubuntu1.13+esm1","binary_name":"tomcat8-admin"},{"binary_version":"8.0.32-1ubuntu1.13+esm1","binary_name":"tomcat8-common"},{"binary_version":"8.0.32-1ubuntu1.13+esm1","binary_name":"tomcat8-docs"},{"binary_version":"8.0.32-1ubuntu1.13+esm1","binary_name":"tomcat8-examples"},{"binary_version":"8.0.32-1ubuntu1.13+esm1","binary_name":"tomcat8-user"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-24733.json"}},{"package":{"name":"tomcat6","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/tomcat6?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.41-4","6.0.45+dfsg-1","6.0.45+dfsg-1ubuntu0.1","6.0.45+dfsg-1ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_version":"6.0.45+dfsg-1ubuntu0.2","binary_name":"libservlet2.5-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-24733.json"}},{"package":{"name":"tomcat7","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/tomcat7?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.0.64-1","7.0.68-1","7.0.68-1ubu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