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Medium severity · published Sep 10, 2026
CVE-2026-75880
Apache Artemis, Apache ActiveMQ Artemis: Message selector wildcard handling could lead to denial of service
6.5
CVSS
0.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AA
Apache ActiveMQ Artemis · Apache Software Foundation
1.0.0 through 2.44.0 · source: vendor
AA
Apache Artemis · Apache Software Foundation
2.50.0 through 2.56.0 · source: vendor
AR
Artemis · Apache
1.0.0 before 2.44.0; 2.50.0 before 2.57.0 · source: NVD
Affected product
AA
Apache ActiveMQ Artemis
Apache Software Foundation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-75880
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-75880
Mailing List
https://lists.apache.org/thread/db34g9qoxd8p08086cr95683fkb8wm5r
Mailing List
http://www.openwall.com/lists/oss-security/2026/09/10/7
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