GHSA-7259-vf48-52q3

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GHSA-7259-vf48-52q3

Summary: Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All has a Memory Allocation with Excessive Size Value vulnerability

Details: An 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. This 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. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.

References: https://nvd.nist.gov/vuln/detail/CVE-2026-50734, https://github.com/apache/activemq/pull/2080, https://github.com/apache/activemq/commit/42e2be75eddcece3cddacf8a73e6cad7db5aa626, https://github.com/apache/activemq/commit/6fc46e520bac7d9763ba5762cc2de603f19ed517, https://github.com/apache/activemq/commit/e25f9b88898ef7cdfac9e855f4559a1ad0a6da12, https://github.com/apache/activemq, https://github.com/apache/activemq/releases/tag/activemq-5.19.8, https://github.com/apache/activemq/releases/tag/activemq-6.2.7, https://lists.apache.org/thread/nxso951fnvf72qf9m475mpz4yf931xk0, http://www.openwall.com/lists/oss-security/2026/06/29/10