GHSA-7259-vf48-52q3
Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All has a Memory Allocation with Excessive Size Value vulnerability
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Maven | org.apache.activemq:activemq-client | < 5.19.8 | 5.19.8 |
| Maven | org.apache.activemq:activemq-client | >= 6.0.0, < 6.2.7 | 6.2.7 |
| Maven | org.apache.activemq:apache-activemq | < 5.19.8 | 5.19.8 |
| Maven | org.apache.activemq:apache-activemq | >= 6.0.0, < 6.2.7 | 6.2.7 |
| Maven | org.apache.activemq:activemq-all | < 5.19.8 | 5.19.8 |
| Maven | org.apache.activemq:activemq-all | >= 6.0.0, < 6.2.7 | 6.2.7 |
Details
As written in the advisory (Markdown source, shown as plain text).
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
External links from the advisory. They lead to third-party sites.
- 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