{"id":"CVE-2026-86243","state":"PUBLISHED","title":"Apache Tomcat Native: DoS via TLS handshake","description":"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.","publishedAt":"2026-09-23T12:24:55.119Z","updatedAt":"2026-09-23T18:10:48.694Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache Tomcat Native"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Tomcat Native","defaultStatus":"unaffected","versions":[{"version":"2.0.0","status":"affected","lessThanOrEqual":"2.0.15","versionType":"semver"},{"version":"1.3.0","status":"affected","lessThanOrEqual":"1.3.8","versionType":"semver"}]}],"references":["https://lists.apache.org/thread/8p4jf02w54m22x0cwpq2x53w3ov8o557","http://www.openwall.com/lists/oss-security/2026/09/23/31"],"weaknesses":["CWE-126"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/86xxx/CVE-2026-86243.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-86243","state":"PUBLISHED","datePublished":"2026-09-23T12:24:55.119Z","dateUpdated":"2026-09-23T18:10:48.694Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-09-06T09:21:33.313Z"},"containers":{"cna":{"title":"Apache Tomcat Native: DoS via TLS handshake","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Tomcat Native","defaultStatus":"unaffected","versions":[{"version":"2.0.0","status":"affected","lessThanOrEqual":"2.0.15","versionType":"semver"},{"version":"1.3.0","status":"affected","lessThanOrEqual":"1.3.8","versionType":"semver"}]}],"references":[{"url":"https://lists.apache.org/thread/8p4jf02w54m22x0cwpq2x53w3ov8o557","tags":["vendor-advisory"]}],"metrics":[{"other":{"type":"Textual description of severity","content":{"text":"important"}},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-126","description":"CWE-126 Buffer over-read","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-09-23T12:24:55.119Z"},"source":{"discovery":"INTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.3"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-23T15:28:53.132953Z","id":"CVE-2026-86243","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-23T15:29:11.463Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/09/23/31"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-09-23T18:10:48.694Z"}}]}}}