CVE-2026-49364 Apache Artemis - Information Disclosure

Apache Artemis 2.50.0 through 2.56.0 and Apache ActiveMQ Artemis 1.0.0 through 2.44.0 contain an information disclosure vulnerability caused by insecure cluster connection handshake, letting unauthenticated network-adjacent attackers capture cluster administrative credentials, exploit requires network adjacency.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.57% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Information Disclosure
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
10 September 2026
Updated
15 October 2026
Weakness
CWE-306

Vendor fix

Upgrade to version 2.57.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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