{"id":"USN-8450-1","summary":"tomcat11 vulnerabilities","details":"It was discovered that Tomcat did not properly limit the size of\nWebDAV LOCK and PROPFIND request bodies. A remote attacker could\npossibly use this issue to cause Tomcat to consume excessive memory,\nresulting in a denial of service. (CVE-2026-41284)\n\nIt was discovered that Tomcat incorrectly validated HTTP/2 header\nfields. A remote attacker could use this issue to cause Tomcat to\ncrash or possibly execute arbitrary code. (CVE-2026-41293)\n\nIt was discovered that Tomcat did not properly clear HTTP\nauthentication headers during WebSocket connection upgrades and\nredirects. A remote attacker could possibly use this issue to obtain\nsensitive credentials. (CVE-2026-42498)\n\nIt was discovered that Tomcat incorrectly handled authorization\nwhen multiple method constraints defined the same HTTP method. A\nremote attacker could possibly use this issue to bypass\nauthorization restrictions. (CVE-2026-43515)","modified":"2026-06-18T22:14:19.718068595Z","published":"2026-06-18T15:56:22Z","related":["UBUNTU-CVE-2026-41284","UBUNTU-CVE-2026-41293","UBUNTU-CVE-2026-42498","UBUNTU-CVE-2026-43515"],"upstream":["CVE-2026-41284","CVE-2026-41293","CVE-2026-42498","CVE-2026-43515","UBUNTU-CVE-2026-41284","UBUNTU-CVE-2026-41293","UBUNTU-CVE-2026-42498","UBUNTU-CVE-2026-43515"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8450-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-41284"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-41293"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42498"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43515"}],"affected":[{"package":{"name":"tomcat11","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/tomcat11?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"11.0.18-1ubuntu0.1~esm1"}]}],"versions":["11.0.6-1","11.0.11-1","11.0.15-1","11.0.18-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libtomcat11-embed-java","binary_version":"11.0.18-1ubuntu0.1~esm1"},{"binary_name":"libtomcat11-java","binary_version":"11.0.18-1ubuntu0.1~esm1"},{"binary_name":"tomcat11","binary_version":"11.0.18-1ubuntu0.1~esm1"},{"binary_name":"tomcat11-admin","binary_version":"11.0.18-1ubuntu0.1~esm1"},{"binary_version":"11.0.18-1ubuntu0.1~esm1","binary_name":"tomcat11-common"},{"binary_name":"tomcat11-docs","binary_version":"11.0.18-1ubuntu0.1~esm1"},{"binary_version":"11.0.18-1ubuntu0.1~esm1","binary_name":"tomcat11-examples"},{"binary_name":"tomcat11-user","binary_version":"11.0.18-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:26.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-41284"},{"id":"CVE-2026-41293","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"medium","type":"Ubuntu"}]},{"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"}],"id":"CVE-2026-42498"},{"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-2026-43515"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8450-1.json"}}],"schema_version":"1.7.5"}