{"id":"CVE-2026-86243","summary":"Apache Tomcat Native: DoS via TLS handshake","details":"Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash.\n\n\n\nThis issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier, unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.","modified":"2026-10-24T10:30:21.769265976Z","published":"2026-09-23T12:24:55.119Z","related":["SUSE-SU-2026:23985-1","SUSE-SU-2026:4544-1","SUSE-SU-2026:4546-1","SUSE-SU-2026:4658-1","openSUSE-SU-2026:11898-1","openSUSE-SU-2026:11899-1","openSUSE-SU-2026:21984-1"],"database_specific":{"cna_assigner":"apache","cwe_ids":["CWE-126"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86243.json","unresolved_ranges":[{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StandardRange","range":[{"introduced":"2.0.0"},{"last_affected":"2.0.15"},{"introduced":"1.3.0"},{"last_affected":"1.3.8"}]}]}]},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/09/23/31"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86243.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/8p4jf02w54m22x0cwpq2x53w3ov8o557"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86243"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/tomcat-native","events":[{"introduced":"39c19afe4a3df7ea4fda778d82dc25bd494a110c"},{"last_affected":"1ac2db19bf68287b527d166128ab0d62d0d4097a"},{"introduced":"998746966815e1ae105cba9f2681d37cc30249bc"},{"last_affected":"8c61da2f325763f65214bdb4876641cbe31a2f0f"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"2.0.0"},{"last_affected":"2.0.15"}],"source":"DESCRIPTION"},{"source":"DESCRIPTION","range":[{"introduced":"1.3.0"},{"last_affected":"1.3.8"}]}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86243.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}