Apache Artemis Wildcard Selector DoS (2.56.0) Upgrade to 2.57.0
CVE-2026-75880 Published on September 10, 2026
Apache Artemis, Apache ActiveMQ Artemis: Message selector wildcard handling could lead to denial of service
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.
Weakness Type
What is a ReDoS Vulnerability?
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Some regular expression engines have a feature called "backtracking". If the token cannot match, the engine "backtracks" to a position that may result in a different token that can match. Backtracking becomes a weakness if all of these conditions are met:
CVE-2026-75880 has been classified to as a ReDoS vulnerability or weakness.
Products Associated with CVE-2026-75880
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Affected Versions
Apache Software Foundation Apache Artemis:- Version 2.50.0, <= 2.56.0 is affected.
- Version 1.0.0, <= 2.44.0 is affected.