{"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.\u00a0\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"}}]}}

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