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Vulnerability record · CVE-2026-49363 · published 10 September 2026

CVE-2026-49363: Apache artemis missing authentication for critical function vulnerability

Apache · Artemis

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.

7.5 CVSS 3.1 High EPSS 0.80% · top 45.0% CWE-306 · Missing authentication for critical function
7.5CVSS 3.1 base score
0.80%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
16 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lists.apache.org/thread/syjch88zw6pfdoso9vs46m23xkgxjbxo Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2026/09/10/2 Mailing ListThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-57967Apache artemis missing authentication for critical function vulnerabilityAn unauthenticated remote attacker can craft a CORE protocol SESSION_REATTACH packet to steal an existing session and assume ongoing execution of the…EPSS 1.1%9.3CVE-2026-27446Apache artemis missing authentication for critical function vulnerabilityMissing Authentication for Critical Function (CWE-306) vulnerability in Apache Artemis, Apache ActiveMQ Artemis. An unauthenticated remote attacker c…EPSS 1.1%9.1CVE-2026-49364Apache artemis missing authentication for critical function vulnerabilityAn unauthenticated network-adjacent attacker can leverage discovery to capture cluster administrative credentials during the initial cluster connecti…EPSS 0.57%9.1CVE-2026-67593Apache artemis missing authentication for critical function vulnerabilityA remote attacker can craft an Openwire RemoveSubscriptionInfo command to cause the deletion of a queue on the Artemis broker before the connection a…EPSS 0.86%8.8CVE-2023-50780Apache artemis improper authorization vulnerabilityApache ActiveMQ Artemis allows access to diagnostic information and controls through MBeans, which are also exposed through the authenticated Jolokia…EPSS 17%7.5CVE-2026-49362Apache artemis missing authentication for critical function vulnerabilityAn unauthenticated remote attacker can create arbitrary durable queues via the CORE protocol, leading to unauthorized broker state manipulation and p…EPSS 0.82%7.5CVE-2022-23913Apache artemis allocation without limits vulnerabilityIn Apache ActiveMQ Artemis prior to 2.20.0 or 2.19.1, an attacker could partially disrupt availability (DoS) through uncontrolled resource consumptio…EPSS 2.7%7.5CVE-2021-26117Apache activemq improper authentication vulnerabilityThe optional ActiveMQ LDAP login module can be configured to use anonymous access to the LDAP server. In this case, for Apache ActiveMQ Artemis prior…EPSS 11%

Source: NIST National Vulnerability Database (record CVE-2026-49363), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.