{"id":"EM-20261104-0YQR","url":"https://cyber.eventmonitor.net/incident/EM-20261104-0YQR/apache-activemq-vulnerability-cve-2026-111821/","type":"cve","title":"Apache ActiveMQ Vulnerability (CVE-2026-111821)","subtitle":"CVE-2026-111821","subject":"CVE-2026-111821","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-11-04T10:17:25.363Z","firstSignal":"2026-11-04T10:10:31.000Z","lastSignal":"2026-11-04T10:17:25.363Z","updated":"2026-11-10T14:04:51.773Z","revision":1,"life":[{"status":"Born","at":"2026-11-04T10:17:25.363Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-11-04T10:17:25.363Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-04T10:10:31.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-04T10:17:25.363Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261104-0YQR created."},{"at":"2026-11-04T10:17:25.363Z","what":"Severity raised to High by C6"}],"stages":[{"name":"Disclosed","at":"2026-11-04T10:17:25.363Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-04T10:17:25.363Z","detail":"CVSS 7.5 · EPSS 0.2%"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-04T10:10:31.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-04T10:10:31.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":2,"title":"Red Hat: CVE-2026-111821 (moderate)","text":"org.apache.activemq/activemq-kahadb-store: activemq-kahadb-store: Denial of Service via oversized durable subscription identifiers","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-111821.json"},{"at":"2026-11-04T10:17:25.363Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-111821 (CVSS 7.5)","text":"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.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111821"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-04T10:17:25.363","score":7.5,"severity":"HIGH","desc":"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…","product":"","seen":1794319491773},"kev":null,"epss":{"epss":0.00216,"pct":0.12069,"at":1793926709349},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}