{"id":"CVE-2026-50734","aliases":["GHSA-7259-vf48-52q3"],"title":"Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All has a Memory Allocation with Excessive Size Value vulnerability","summary":"Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All has a Memory Allocation with Excessive Size Value vulnerability","severity":"high","cvss":7.5,"cwe":["CWE-789"],"vendor":"apache","product":"org.apache.activemq:activemq-client","ecosystem":"maven","affected":["org.apache.activemq:activemq-client < 5.19.8","org.apache.activemq:activemq-client >= 6.0.0, < 6.2.7","org.apache.activemq:apache-activemq < 5.19.8","org.apache.activemq:apache-activemq >= 6.0.0, < 6.2.7","org.apache.activemq:activemq-all < 5.19.8","org.apache.activemq:activemq-all >= 6.0.0, < 6.2.7"],"patched":["org.apache.activemq:activemq-client 5.19.8","org.apache.activemq:activemq-client 6.2.7","org.apache.activemq:apache-activemq 5.19.8","org.apache.activemq:apache-activemq 6.2.7","org.apache.activemq:activemq-all 5.19.8","org.apache.activemq:activemq-all 6.2.7"],"published":"2026-06-30","updated":"2026-11-04","sourceUpdated":"2026-11-04T15:59:58Z","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-7259-vf48-52q3","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50734"},{"url":"https://lists.apache.org/thread/nxso951fnvf72qf9m475mpz4yf931xk0"},{"url":"http://www.openwall.com/lists/oss-security/2026/06/29/10"},{"url":"https://github.com/apache/activemq/pull/2080"},{"url":"https://github.com/apache/activemq/commit/42e2be75eddcece3cddacf8a73e6cad7db5aa626"},{"url":"https://github.com/apache/activemq/commit/6fc46e520bac7d9763ba5762cc2de603f19ed517"},{"url":"https://github.com/apache/activemq/commit/e25f9b88898ef7cdfac9e855f4559a1ad0a6da12"},{"url":"https://github.com/apache/activemq/releases/tag/activemq-5.19.8"},{"url":"https://github.com/apache/activemq/releases/tag/activemq-6.2.7"},{"url":"https://github.com/advisories/GHSA-7259-vf48-52q3"}],"tags":["ghsa","maven"],"epss":0.0074,"epssPercentile":0.54726,"ingestedAt":"2026-11-04T16:18:35.578Z","slug":"CVE-2026-50734","body":"## Overview\n\nAn unauthenticated network attacker can cause a broker DoS by sending a crafted WireFormatInfo frame with a malicious large size value. The value is not validate and causes the broker to attempt allocation during pre-auth negotiation which can trigger OOM and crash the broker.\nThis issue affects Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7.\n\nUsers are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.\n\n## Affected packages\n\n- `org.apache.activemq:activemq-client < 5.19.8`\n- `org.apache.activemq:activemq-client >= 6.0.0, < 6.2.7`\n- `org.apache.activemq:apache-activemq < 5.19.8`\n- `org.apache.activemq:apache-activemq >= 6.0.0, < 6.2.7`\n- `org.apache.activemq:activemq-all < 5.19.8`\n- `org.apache.activemq:activemq-all >= 6.0.0, < 6.2.7`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `org.apache.activemq:activemq-client 5.19.8`\n- `org.apache.activemq:activemq-client 6.2.7`\n- `org.apache.activemq:apache-activemq 5.19.8`\n- `org.apache.activemq:apache-activemq 6.2.7`\n- `org.apache.activemq:activemq-all 5.19.8`\n- `org.apache.activemq:activemq-all 6.2.7`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}