{"id":"UBUNTU-CVE-2026-34500","details":"CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue.","modified":"2026-07-09T21:30:43.960023444Z","published":"2026-04-09T20:16:00Z","upstream":["CVE-2026-34500"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-34500"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-34500"},{"type":"REPORT","url":"https://lists.apache.org/thread/7rcl4zdxryc8hy3htyfyxkbqpxjtfdl2"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2026/04/09/29"}],"affected":[{"package":{"name":"tomcat10","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/tomcat10?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.1.35-1","10.1.40-1","10.1.40-1ubuntu1","10.1.40-1ubuntu1.25.10.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libtomcat10-embed-java","binary_version":"10.1.40-1ubuntu1.25.10.1"},{"binary_name":"libtomcat10-java","binary_version":"10.1.40-1ubuntu1.25.10.1"},{"binary_name":"tomcat10","binary_version":"10.1.40-1ubuntu1.25.10.1"},{"binary_name":"tomcat10-admin","binary_version":"10.1.40-1ubuntu1.25.10.1"},{"binary_version":"10.1.40-1ubuntu1.25.10.1","binary_name":"tomcat10-common"},{"binary_name":"tomcat10-docs","binary_version":"10.1.40-1ubuntu1.25.10.1"},{"binary_name":"tomcat10-examples","binary_version":"10.1.40-1ubuntu1.25.10.1"},{"binary_version":"10.1.40-1ubuntu1.25.10.1","binary_name":"tomcat10-user"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34500.json"}},{"package":{"name":"tomcat11","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/tomcat11?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.0.6-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libtomcat11-embed-java","binary_version":"11.0.6-1"},{"binary_version":"11.0.6-1","binary_name":"libtomcat11-java"},{"binary_name":"tomcat11","binary_version":"11.0.6-1"},{"binary_name":"tomcat11-admin","binary_version":"11.0.6-1"},{"binary_version":"11.0.6-1","binary_name":"tomcat11-common"},{"binary_name":"tomcat11-docs","binary_version":"11.0.6-1"},{"binary_name":"tomcat11-examples","binary_version":"11.0.6-1"},{"binary_version":"11.0.6-1","binary_name":"tomcat11-user"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34500.json"}},{"package":{"name":"tomcat9","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/tomcat9?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.0.70-2ubuntu1.1","9.0.70-2ubuntu2","9.0.70-2ubuntu3","9.0.95-1ubuntu1","9.0.95-1ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_version":"9.0.95-1ubuntu1.1","binary_name":"libtomcat9-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34500.json"}},{"package":{"name":"tomcat10","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/tomcat10?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.1.40-1ubuntu1","10.1.40-1ubuntu1.26.04.1","10.1.55-1ubuntu2~26.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libtomcat10-embed-java","binary_version":"10.1.55-1ubuntu2~26.04.1"},{"binary_name":"libtomcat10-java","binary_version":"10.1.55-1ubuntu2~26.04.1"},{"binary_version":"10.1.55-1ubuntu2~26.04.1","binary_name":"tomcat10"},{"binary_name":"tomcat10-admin","binary_version":"10.1.55-1ubuntu2~26.04.1"},{"binary_name":"tomcat10-common","binary_version":"10.1.55-1ubuntu2~26.04.1"},{"binary_version":"10.1.55-1ubuntu2~26.04.1","binary_name":"tomcat10-docs"},{"binary_version":"10.1.55-1ubuntu2~26.04.1","binary_name":"tomcat10-examples"},{"binary_version":"10.1.55-1ubuntu2~26.04.1","binary_name":"tomcat10-user"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34500.json"}},{"package":{"name":"tomcat9","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/tomcat9?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.0.95-1ubuntu1","9.0.111-1","9.0.115-1","9.0.115-1ubuntu0.1","9.0.118-1~26.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libtomcat9-java","binary_version":"9.0.118-1~26.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34500.json"}},{"package":{"name":"tomcat11","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/tomcat11?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.0.6-1","11.0.11-1","11.0.15-1","11.0.18-1","11.0.18-1ubuntu0.1~esm1","11.0.22-2ubuntu2~26.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libtomcat11-embed-java","binary_version":"11.0.22-2ubuntu2~26.04.1"},{"binary_name":"libtomcat11-java","binary_version":"11.0.22-2ubuntu2~26.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