Critical9.1Vendor: HighRed Hat Linux

Critical [CVE-2026-27446] org.apache.artemis:artemis-server: org.apache.activemq:artemis-server: Apache Artemis, Apache ActiveMQ Artemis: Message injection and exfiltration due to missing authentication

This critical-severity Red Hat Linux advisory covers CVE-2026-27446 affecting Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8, Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9, Red Hat build of OptaPlanner 8.

CVE-2026-27446 Published Mar 4, 2026

CVE-2026-27446

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

org.apache.artemis:artemis-server: org.apache.activemq:artemis-server: Apache Artemis, Apache ActiveMQ Artemis: Message injection and exfiltration due to missing authentication. Red Hat rates this important (CVSS 9.1).

Weakness: CWE-306. Affected package(s): eap8-activemq-artemis, artemis-server.

Resolved in Red Hat advisory RHSA-2026:3955 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9; Red Hat build of OptaPlanner 8; Red Hat Fuse 7; and 3 more.

Affected versions

eap8-activemq-artemis-0:2.40.0-6.redhat_00012.1.el8eap
eap8-activemq-artemis-0:2.40.0-6.redhat_00012.1.el9eap
artemis-server

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:3955

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:3955 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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