Critical severity · published Sep 10, 2026
CVE-2026-49364
Apache Artemis, Apache Artemis, Apache ActiveMQ Artemis, Apache ActiveMQ Artemis: Pre-Authentication Cluster Credential Exposure to Discovered Peers
9.1
CVSS
0.6%
EPSS
No
On KEV
Description
An unauthenticated network-adjacent attacker can leverage discovery to capture cluster administrative credentials during the initial cluster connection handshake.
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 the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% 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; 1.0.0 through 2.44.0 · source: vendor
AA
Apache Artemis · Apache Software Foundation
2.50.0 through 2.56.0; 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
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49364
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-49364
Mailing List
https://lists.apache.org/thread/4qbgcz3k38q30bfbf7hphtomrdc8l8n8
Mailing List
http://www.openwall.com/lists/oss-security/2026/09/10/3
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