{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-111821","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","state":"PUBLISHED","assignerShortName":"apache","dateReserved":"2026-10-16T22:59:40.999Z","datePublished":"2026-11-04T10:10:31.596Z","dateUpdated":"2026-11-04T10:10:41.422Z"},"containers":{"cna":{"providerMetadata":{"orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","shortName":"apache","dateUpdated":"2026-11-04T10:10:31.596Z"},"title":"Apache ActiveMQ, Apache ActiveMQ KahaDB: Oversized client identifier strings poison the KahaDB journal","problemTypes":[{"descriptions":[{"description":"CWE-20 Improper input validation","lang":"en","cweId":"CWE-20","type":"CWE"}]}],"source":{"discovery":"UNKNOWN"},"affected":[{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ","packageURL":"pkg:maven/org.apache.activemq/apache-activemq","versions":[{"status":"affected","version":"6.0.0","lessThan":"6.3.3","versionType":"semver"},{"status":"affected","version":"0","lessThan":"5.19.12","versionType":"semver"}],"defaultStatus":"unaffected","collectionURL":"https://repo.maven.apache.org/maven2","packageName":"org.apache.activemq:apache-activemq"},{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ KahaDB","packageURL":"pkg:maven/org.apache.activemq/activemq-kahadb-store","versions":[{"status":"affected","version":"6.0.0","lessThan":"6.3.3","versionType":"semver"},{"status":"affected","version":"0","lessThan":"5.19.12","versionType":"semver"}],"defaultStatus":"unaffected","collectionURL":"https://repo.maven.apache.org/maven2","packageName":"org.apache.activemq:activemq-kahadb-store"}],"descriptions":[{"value":"Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB.\n\n\n\nA user can create a durable subscription with a clientId and subscription name that have a combined length > 65,535 (while separately being shorter) on a broker using KahaDB which can cause the broker to shutdown and be unrecoverable. \n\n\n\nThis issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12.\n\n\n\nUsers are recommended to upgrade to version 6.4.0, 6.3.3 or 5.19.12, which fixes the issue.","lang":"en","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB.</p><p>A user can create a durable subscription with a clientId and subscription name that have a combined length &gt; 65,535 (while separately being shorter) on a broker using KahaDB which can cause the broker to shutdown and be unrecoverable.&nbsp;</p><p>This issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12.</p><p>Users are recommended to upgrade to version 6.4.0, 6.3.3 or 5.19.12, which fixes the issue.</p>"}]}],"references":[{"url":"https://lists.apache.org/thread/p8gxq66lmztkrls74wkz3xh9chqd0pwl","tags":["vendor-advisory"]}],"metrics":[{"other":{"type":"Textual description of severity","content":{"text":"important"}},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"x_generator":{"engine":"Vulnogram 1.0.3"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/11/03/19"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-11-04T10:10:41.422Z"}}]}}