{"id":"USN-8551-1","summary":"tomcat8 vulnerabilities","details":"It was discovered that Tomcat incorrectly handled authorization when\nmultiple method constraints defined the same HTTP method. A remote\nattacker could possibly use this issue to bypass authorization\nrestrictions. (CVE-2026-43515)\n\nIt was discovered that the Tomcat number guess example application did\nnot properly sanitize user-supplied input. An attacker could possibly\nuse this issue to inject malicious scripts, resulting in cross-site\nscripting. (CVE-2026-50229)\n\nIt was discovered that Tomcat incorrectly evaluated rewrite valve\nconditions in certain configurations. An attacker could possibly use\nthis issue to bypass rewrite rules, resulting in unauthorized access.\n(CVE-2026-53404)\n\nIt was discovered that Tomcat incorrectly omitted certain authorization\ninformation when logging the effective web.xml configuration. An\nattacker could possibly use this issue to hide authorization\nconstraints, resulting in reduced auditability. (CVE-2026-55276)","modified":"2026-07-15T23:49:59.678880451Z","published":"2026-07-15T14:15:28Z","related":["UBUNTU-CVE-2026-43515","UBUNTU-CVE-2026-50229","UBUNTU-CVE-2026-53404","UBUNTU-CVE-2026-55276"],"upstream":["CVE-2026-43515","CVE-2026-50229","CVE-2026-53404","CVE-2026-55276","UBUNTU-CVE-2026-43515","UBUNTU-CVE-2026-50229","UBUNTU-CVE-2026-53404","UBUNTU-CVE-2026-55276"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8551-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43515"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-50229"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53404"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-55276"}],"affected":[{"package":{"name":"tomcat8","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/tomcat8?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.0.32-1ubuntu1.13+esm2"}]}],"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_name":"libservlet3.1-java","binary_version":"8.0.32-1ubuntu1.13+esm2"},{"binary_name":"libtomcat8-java","binary_version":"8.0.32-1ubuntu1.13+esm2"},{"binary_version":"8.0.32-1ubuntu1.13+esm2","binary_name":"tomcat8"},{"binary_version":"8.0.32-1ubuntu1.13+esm2","binary_name":"tomcat8-admin"},{"binary_version":"8.0.32-1ubuntu1.13+esm2","binary_name":"tomcat8-common"},{"binary_version":"8.0.32-1ubuntu1.13+esm2","binary_name":"tomcat8-docs"},{"binary_name":"tomcat8-examples","binary_version":"8.0.32-1ubuntu1.13+esm2"},{"binary_version":"8.0.32-1ubuntu1.13+esm2","binary_name":"tomcat8-user"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-43515","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-50229"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-53404"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-55276"}],"ecosystem":"Ubuntu:Pro:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8551-1.json"}},{"package":{"name":"tomcat8","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/tomcat8?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.5.39-1ubuntu1~18.04.3+esm6"}]}],"versions":["8.5.21-1ubuntu1","8.5.29-1","8.5.30-1","8.5.30-1ubuntu1","8.5.30-1ubuntu1.2","8.5.30-1ubuntu1.3","8.5.30-1ubuntu1.4","8.5.39-1ubuntu1~18.04.1","8.5.39-1ubuntu1~18.04.2","8.5.39-1ubuntu1~18.04.3","8.5.39-1ubuntu1~18.04.3+esm1","8.5.39-1ubuntu1~18.04.3+esm2","8.5.39-1ubuntu1~18.04.3+esm3","8.5.39-1ubuntu1~18.04.3+esm4","8.5.39-1ubuntu1~18.04.3+esm5"],"ecosystem_specific":{"binaries":[{"binary_version":"8.5.39-1ubuntu1~18.04.3+esm6","binary_name":"libtomcat8-embed-java"},{"binary_name":"libtomcat8-java","binary_version":"8.5.39-1ubuntu1~18.04.3+esm6"},{"binary_name":"tomcat8","binary_version":"8.5.39-1ubuntu1~18.04.3+esm6"},{"binary_name":"tomcat8-admin","binary_version":"8.5.39-1ubuntu1~18.04.3+esm6"},{"binary_name":"tomcat8-common","binary_version":"8.5.39-1ubuntu1~18.04.3+esm6"},{"binary_name":"tomcat8-docs","binary_version":"8.5.39-1ubuntu1~18.04.3+esm6"},{"binary_version":"8.5.39-1ubuntu1~18.04.3+esm6","binary_name":"tomcat8-examples"},{"binary_version":"8.5.39-1ubuntu1~18.04.3+esm6","binary_name":"tomcat8-user"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"id":"CVE-2026-43515","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-50229","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-53404","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-55276"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8551-1.json"}}],"schema_version":"1.7.5"}