CVE-2026-75880: Apache Artemis, Apache ActiveMQ Artemis: Message selector wildcard handling could lead to denial of service
CVE-2026-75880: authenticated ActiveMQ Artemis clients can cause denial of service via crafted selector wildcard handling in affected versions.
An authenticated client can attach a consumer with a selector containing crafted wildcard usage, causing excessive evaluation during message delivery attempts that occupies a shared broker thread and leads to denial of service. Affected versions are Apache Artemis artemis-selector 2.50.0 through 2.56.0 and Apache ActiveMQ Artemis artemis-selector 1.0.0 through 2.44.0. Apache rates the issue moderate.