{"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":"2026-07-30T01:30:15.890660522Z","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","6.0.39-1ubuntu0.1+esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"6.0.39-1ubuntu0.1+esm3","binary_name":"libservlet2.4-java"},{"binary_version":"6.0.39-1ubuntu0.1+esm3","binary_name":"libservlet2.5-java"},{"binary_name":"libtomcat6-java","binary_version":"6.0.39-1ubuntu0.1+esm3"},{"binary_version":"6.0.39-1ubuntu0.1+esm3","binary_name":"tomcat6"},{"binary_name":"tomcat6-admin","binary_version":"6.0.39-1ubuntu0.1+esm3"},{"binary_name":"tomcat6-common","binary_version":"6.0.39-1ubuntu0.1+esm3"},{"binary_name":"tomcat6-docs","binary_version":"6.0.39-1ubuntu0.1+esm3"},{"binary_name":"tomcat6-examples","binary_version":"6.0.39-1ubuntu0.1+esm3"},{"binary_name":"tomcat6-extras","binary_version":"6.0.39-1ubuntu0.1+esm3"},{"binary_name":"tomcat6-user","binary_version":"6.0.39-1ubuntu0.1+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-24733.json"}},{"package":{"name":"tomcat9","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/tomcat9?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.0.16-3~18.04.1","9.0.16-3ubuntu0.18.04.1","9.0.16-3ubuntu0.18.04.2","9.0.16-3ubuntu0.18.04.2+esm1","9.0.16-3ubuntu0.18.04.2+esm2","9.0.16-3ubuntu0.18.04.2+esm3","9.0.16-3ubuntu0.18.04.2+esm4","9.0.16-3ubuntu0.18.04.2+esm5","9.0.16-3ubuntu0.18.04.2+esm6","9.0.16-3ubuntu0.18.04.2+esm7","9.0.16-3ubuntu0.18.04.2+esm8"],"ecosystem_specific":{"binaries":[{"binary_version":"9.0.16-3ubuntu0.18.04.2+esm8","binary_name":"libtomcat9-embed-java"},{"binary_version":"9.0.16-3ubuntu0.18.04.2+esm8","binary_name":"libtomcat9-java"},{"binary_name":"tomcat9","binary_version":"9.0.16-3ubuntu0.18.04.2+esm8"},{"binary_version":"9.0.16-3ubuntu0.18.04.2+esm8","binary_name":"tomcat9-admin"},{"binary_version":"9.0.16-3ubuntu0.18.04.2+esm8","binary_name":"tomcat9-common"},{"binary_name":"tomcat9-docs","binary_version":"9.0.16-3ubuntu0.18.04.2+esm8"},{"binary_name":"tomcat9-examples","binary_version":"9.0.16-3ubuntu0.18.04.2+esm8"},{"binary_version":"9.0.16-3ubuntu0.18.04.2+esm8","binary_name":"tomcat9-user"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-24733.json"}},{"package":{"name":"tomcat9","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/tomcat9?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.0.24-1","9.0.27-1","9.0.31-1","9.0.31-1ubuntu0.1","9.0.31-1ubuntu0.2","9.0.31-1ubuntu0.3","9.0.31-1ubuntu0.4","9.0.31-1ubuntu0.5","9.0.31-1ubuntu0.6","9.0.31-1ubuntu0.7","9.0.31-1ubuntu0.8","9.0.31-1ubuntu0.9","9.0.31-1ubuntu0.9+esm1","9.0.31-1ubuntu0.9+esm2","9.0.31-1ubuntu0.9+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"libtomcat9-embed-java","binary_version":"9.0.31-1ubuntu0.9+esm3"},{"binary_name":"libtomcat9-java","binary_version":"9.0.31-1ubuntu0.9+esm3"},{"binary_version":"9.0.31-1ubuntu0.9+esm3","binary_name":"tomcat9"},{"binary_name":"tomcat9-admin","binary_version":"9.0.31-1ubuntu0.9+esm3"},{"binary_version":"9.0.31-1ubuntu0.9+esm3","binary_name":"tomcat9-common"},{"binary_name":"tomcat9-docs","binary_version":"9.0.31-1ubuntu0.9+esm3"},{"binary_version":"9.0.31-1ubuntu0.9+esm3","binary_name":"tomcat9-examples"},{"binary_name":"tomcat9-user","binary_version":"9.0.31-1ubuntu0.9+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-24733.json"}},{"package":{"name":"tomcat9","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/tomcat9?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.0.43-3","9.0.54-1","9.0.55-1","9.0.58-1","9.0.58-1ubuntu0.1","9.0.58-1ubuntu0.1+esm1","9.0.58-1ubuntu0.1+esm2","9.0.58-1ubuntu0.1+esm3","9.0.58-1ubuntu0.1+esm4","9.0.58-1ubuntu0.2","9.0.58-1ubuntu0.2+esm1","9.0.58-1ubuntu0.2+esm2","9.0.58-1ubuntu0.2+esm3","9.0.58-1ubuntu0.2+esm4"],"ecosystem_specific":{"binaries":[{"binary_version":"9.0.58-1ubuntu0.2+esm4","binary_name":"libtomcat9-embed-java"},{"binary_version":"9.0.58-1ubuntu0.2+esm4","binary_name":"libtomcat9-java"},{"binary_version":"9.0.58-1ubuntu0.2+esm4","binary_name":"tomcat9"},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