Critical 9.3Published Mar 4, 2026

CVE-2026-27446Apache Artemis, Apache ActiveMQ Artemis: Auth bypass for Core downstream federation

Updated under an hour ago (Oct 27, 2026, 12:10 PM ET)

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It affects Apache Software Foundation Apache Artemis and 15 other products. Add what you run to find out whether that includes you.

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Every CVE for Apache Software Foundation Apache Artemis

Exploited in the last 30 days

Missing Authentication for Critical Function (CWE-306) vulnerability in Apache Artemis, Apache ActiveMQ Artemis. An unauthenticated remote attacker can use the Core protocol to force a target broker to establish an outbound Core federation connection to an attacker-controlled rogue broker. This could potentially result in message injection into any queue and/or message exfiltration from any queue via the rogue broker. This impacts environments that allow both: - incoming Core protocol connections from untrusted sources to the broker - outgoing Core protocol connections from the broker to untrusted targets This issue affects: - Apache Artemis from 2.50.0 through 2.51.0 - Apache ActiveMQ Artemis from 2.11.0 through 2.44.0. Users are recommended to upgrade to Apache Artemis version 2.52.0, which fixes the issue. The issue can be mitigated by one of the following: - Remove Core protocol support from any acceptor receiving connections from untrusted sources. Incoming Core protocol connections are supported by default via the "artemis" acceptor listening on port 61616. See the "protocols" URL parameter configured for the acceptor. An acceptor URL without this parameter supports all protocols by default, including Core. - Use two-way SSL (i.e. certificate-based authentication) in order to force every client to present the proper SSL certificate when establishing a connection before any message protocol handshake is attempted. This will prevent unauthenticated exploitation of this vulnerability. - Implement and deploy a Core interceptor to deny all Core downstream federation connect packets. Such packets have a type of (int) -16 or (byte) 0xfffffff0. Documentation for interceptors is available at https://artemis.apache.org/components/artemis/documentation/latest/intercepting-operations.html .

CVSS: 9.3 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L
Weakness (CWE): CWE-306
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Modified
Record last updated: Sep 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache Artemis apache_software_foundation:apache_artemis (from the name)	from 2.50.0 through 2.51.0	CNA record
Apache Software Foundation Apache ActiveMQ Artemis apache_software_foundation:apache_activemq_artemis (from the name)	from 2.11.0 through 2.44.0	CNA record
Siemens Opcenter RDnL siemens:opcenter_rdnl (from the name)	all versions	CISA ADP
Red Hat Red Hat AMQ Broker 7.12.6 redhat:amq_broker	7.12	CISA ADP
Red Hat Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14 redhat:apache_camel_spring_boot	4.18	CISA ADP
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 redhat:jboss_enterprise_application_platform_els	from 0:2.16.0-22.redhat_00057.1.el7eap not affected	CISA ADP
Red Hat Red Hat JBoss Enterprise Application Platform 8.1.7.GA redhat:jboss_enterprise_application_platform	from 2.40.0.redhat-00015 not affected	CISA ADP
Red Hat Red Hat AMQ Clients redhat:amq_clients	2023	CISA ADP
Red Hat Red Hat build of OptaPlanner 8 redhat:optaplanner	All versions	CISA ADP
Red Hat Red Hat Fuse 7 redhat:jboss_fuse	7	CISA ADP
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References

References

https://lists.apache.org/thread/jwpsdc8tdxotm98od8n8n30fqlzoc8gg	vendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/03/03/4	mailing-list, third-party-advisory
http://www.openwall.com/lists/oss-security/2026/03/04/1	mailing-list, third-party-advisory
https://access.redhat.com/errata/RHSA-2026:17668
https://access.redhat.com/errata/RHSA-2026:18054
https://access.redhat.com/errata/RHSA-2026:18055
https://access.redhat.com/errata/RHSA-2026:18059
https://access.redhat.com/errata/RHSA-2026:3955
https://access.redhat.com/errata/RHSA-2026:3957
https://access.redhat.com/errata/RHSA-2026:53644
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.