CVE-2026-75880
An authenticated client could attach a consumer with a selector containing crafted wildcard usage that results in excessive evaluation during message delivery attempts, occupying a shared broker thread and leading to denial of service. This issue affects Apache Artemis: from 2.50.0 through 2.56.0; Apache ActiveMQ Artemis: from 1.0.0 through 2.44.0. Users are recommended to upgrade to version 2.57.0, which fixes this issue.
- Published Sep 10, 2026
- CVSS 6.5 medium
- 0.7% chance of exploitation in the next 30 days (EPSS)
- A fix is available