CVE-2026-49363

EUVD-2026-75249
An unauthenticated remote attacker connecting with the CORE protocol can discover cluster node details by sending a SUBSCRIBE_TOPOLOGY request prior to authentication.



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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
apacheCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 56.35%
Affected Products (NVD)
VendorProductVersion
apacheactivemq_artemis
1.0.0 ≤
𝑥
< 2.44.0
apacheactivemq_artemis
2.50.0 ≤
𝑥
< 2.57.0
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
apacheartemis
2.50.0 ≤
𝑥
≤ 2.56.0
CNA
apacheartemis
1.0.0 ≤
𝑥
≤ 2.44.0
CNA
Common Weakness Enumeration
References
https://lists.apache.org/thread/syjch88zw6pfdoso9vs46m23xkgxjbxo
http://www.openwall.com/lists/oss-security/2026/09/10/2