CVE-2026-108949

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{"bugzilla": {"description": "org.apache.activemq/activemq-broker: activemq-broker: Denial of Service via memory leak from rejected subscriptions", "id": "2566821", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2566821"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["Denial of Service via OOM vulnerability in Apache ActiveMQ, ActiveMQ Broker.\nAn authenticated OpenWire client that sends a ConsumerInfo for a temporary queue/topic owned by another connection is rejected with InvalidDestinationException, but the rejected Subscription is left behind in the region's subscriptions map. Repeating the request\u00a0leaks broker heap until OOM because the broker does not clean up the rejected subscriptions in the map.\nThis issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; ActiveMQ Broker: from 6.0.0 before 6.3.3, before 5.19.12.\nUsers are recommended to upgrade to version 6.4.0, 6.3.3, or 5.19.12, which fixes the issue.", "A flaw was found in Apache ActiveMQ. When an authenticated client requests access to a temporary destination owned by another connection, the broker rejects the request but fails to remove the rejected subscription entry from internal memory. By repeatedly issuing these requests, an authenticated attacker can cause an unbounded memory leak, ultimately leading to an Out-of-Memory (OOM) condition and a Denial of Service (DoS) for the broker."], "mitigation": {"lang": "en:us", "value": "Upgrade to fixed versions (activemq-broker 6.4.0, 6.3.3, or 5.19.12); restrict broker authentication and monitor broker heap."}, "name": "CVE-2026-108949", "package_state": [{"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Out of support scope", "package_name": "activemq-broker", "product_name": "Red Hat Fuse 7"}], "public_date": "2026-11-04T10:09:31Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-108949\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-108949\nhttp://www.openwall.com/lists/oss-security/2026/11/03/18\nhttps://lists.apache.org/thread/2l1jbc8j88w1n9bd44vm9bjtj9t3o80n"], "statement": "An authenticated remote user can leak broker heap via repeated rejected temporary-destination consumer requests until OOM; upgrade to activemq-broker 6.4.0/6.3.3 or 5.19.12; requiring broker-side OpenWire authentication mitigates anonymous exploitation.", "threat_severity": "Moderate"}

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