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CVE-2026-27446

Apache Artemis, Apache ActiveMQ Artemis: Auth bypass for Core downstream federation

Published: Mar 4, 2026Updated: Jun 15, 2026 Sources: CVE List NVD GHSA csafCWE-306
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
8.3%
Top 5.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Opcenter RDnL is affected by missing authentication in critical function in ‘ActiveMQ Artemis’. An unauthenticated attacker within the adjacent network could 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 availability impacts or message injection into any queue via the rogue broker. Breaking the integrity of a message has a low impact due to missing auto refresh functionality and it does not contain any confidential information. ActiveMQ Artemis has released a new version and Siemens recommends to update to the latest version.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-306

Affected Products

artemisapache
On-premDatabase
Databases / cache-message-queue
org.apache.activemq:artemis-serverMavenOSS Libraries
org.apache.artemis:artemis-serverMavenOSS Libraries
Apache ArtemisApache Software Foundation
Mixed
Web & CMS Plugins / cms-core
Apache ActiveMQ ArtemisApache Software Foundation
Mixed
Web & CMS Plugins / cms-core
apacheoss-projectUSWeb & CMS Pluginsaka apache http server, apache httpd
mavenpackage-ecosystemOSS Libraries
apache software foundationoss-projectUSWeb & CMS Pluginsaka apache foundation

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://cert-portal.siemens.com/productcert/csaf/ssa-085541.json
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-085541.html
cert-portal.siemens.com
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-134-09.json
raw.githubusercontent.com
and 15 more references View all →

Timeline

Published
Mar 4, 2026
Last Updated
Jun 15, 2026

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