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Fencer Vulns
critical 9.1

CVE-2026-27446 in the critical feed json

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

published 2026-03-04 8 mo ago modified 2026-09-18 52 d ago also EUVD-2026-9382 , GHSA-fw88-pf9m-p947

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
11.4%
EPSS 11.4% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

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 .

Patch / fix

  • maven org.apache.artemis:artemis-server 2.52.0
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 0:1.5.26-2.Final_redhat_00001.1.el7eap, 0:1.10.0-46.Final_redhat_00044.1.el7eap, 0:2.2.40-2.SP3_redhat_00001.1.el7eap, 0:2.3.14-11.SP11_redhat_00001.1.el7eap, 0:2.5.5-24.SP12_redhat_00016.1.el7eap, 0:2.5.5-30.SP12_redhat_00020.1.el7eap, 0:2.16.0-22.redhat_00057.1.el7eap, 0:2.18.8-1.redhat_00003.1.el7eap, 0:4.1.135-1.Final_redhat_00001.1.el7eap, 0:5.0.31-3.SP2_redhat_00001.1.el7eap, 0:7.4.25-2.GA_redhat_00001.1.el7eap
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8 0:1.5.26-2.Final_redhat_00001.1.el8eap, 0:1.10.0-46.Final_redhat_00044.1.el8eap, 0:2.2.40-1.SP3_redhat_00001.1.el8eap, 0:2.3.14-11.SP11_redhat_00001.1.el8eap, 0:2.5.5-24.SP12_redhat_00016.1.el8eap, 0:2.5.5-30.SP12_redhat_00020.1.el8eap, 0:2.16.0-22.redhat_00057.1.el8eap, 0:2.18.8-1.redhat_00003.1.el8eap, 0:4.1.135-1.Final_redhat_00001.1.el8eap, 0:5.0.31-3.SP2_redhat_00001.1.el8eap, 0:7.4.25-2.GA_redhat_00001.1.el8eap
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9 0:1.5.26-2.Final_redhat_00001.1.el9eap, 0:1.10.0-46.Final_redhat_00044.1.el9eap, 0:2.2.40-1.SP3_redhat_00001.1.el9eap, 0:2.3.14-11.SP11_redhat_00001.1.el9eap, 0:2.5.5-24.SP12_redhat_00016.1.el9eap, 0:2.5.5-30.SP12_redhat_00020.1.el9eap, 0:2.16.0-22.redhat_00057.1.el9eap, 0:2.18.8-1.redhat_00003.1.el9eap, 0:4.1.135-1.Final_redhat_00001.1.el9eap, 0:5.0.31-3.SP2_redhat_00001.1.el9eap, 0:7.4.25-2.GA_redhat_00001.1.el9eap
  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1.7.GA 2.40.0.redhat-00015
  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 0:2.40.0-6.redhat_00012.1.el8eap
  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 0:2.40.0-6.redhat_00012.1.el9eap
  • eap8-angus jboss enterprise application platform 8.1 2.0.5-1.redhat_00001.1.el8eap
  • eap8-guava jboss enterprise application platform 8.1 33.0.0-3.jre_redhat_00004.1.el8eap
  • eap8-netty jboss enterprise application platform 8.1 4.1.132-1.Final_redhat_00001.1.el8eap
  • eap8-yasson jboss enterprise application platform 8.1 3.0.4-5.redhat_00007.1.el8eap
  • eap8-jctools jboss enterprise application platform 8.1 4.0.6-1.redhat_00001.1.el8eap
  • eap8-wildfly jboss enterprise application platform 8.1 8.1.6-5.GA_redhat_00007.1.el8eap
  • eap8-hibernate jboss enterprise application platform 8.1 6.6.48-1.Final_redhat_00001.1.el8eap
  • eap8-angus-mail jboss enterprise application platform 8.1 2.0.5-1.redhat_00001.1.el8eap

red hat advisories RHSA-2026:53645RHSA-2026:53646RHSA-2026:53644RHSA-2026:18054RHSA-2026:18055

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-27446 updated cvss 9.1

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 build of OptaPlanner 8 artemis-server Red Hat Fuse 7 artemis-server Red Hat Process Automation 7 artemis-server
    affected: workaround, no fix planned “Will not fix”
  • Red Hat AMQ Broker 7.12.6
    fixed: vendor fix RHSA-2026:3955
  • Red Hat AMQ Broker 7.13.4
    fixed: vendor fix RHSA-2026:3957
  • Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14
    fixed: vendor fix RHSA-2026:17668
  • Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server eap7-wildfly 7.4.25-2.GA_redhat_00001.1.el7eap, eap7-jackson-core 2.18.8-1.redhat_00003.1.el7eap, eap7-netty 4.1.135-1.Final_redhat_00001.1.el7eap, eap7-undertow 2.2.40-2.SP3_redhat_00001.1.el7eap, eap7-jackson-databind 2.18.8-1.redhat_00003.1.el7eap, eap7-netty-all 4.1.135-1.Final_redhat_00001.1.el7eap, +78 more
    fixed: vendor fix RHSA-2026:53644
  • Red Hat JBoss EAP 8.1 for RHEL 8 eap8-activemq-artemis 2.40.0-6.redhat_00012.1.el8eap, eap8-activemq-artemis-cli 2.40.0-6.redhat_00012.1.el8eap, eap8-activemq-artemis-dto 2.40.0-6.redhat_00012.1.el8eap, eap8-activemq-artemis-server 2.40.0-6.redhat_00012.1.el8eap, eap8-activemq-artemis-commons 2.40.0-6.redhat_00012.1.el8eap, eap8-activemq-artemis-journal 2.40.0-6.redhat_00012.1.el8eap, +9 more
    fixed: vendor fix RHSA-2026:18054
  • Red Hat JBoss EAP 8.1 for RHEL 9 eap8-activemq-artemis 2.40.0-6.redhat_00012.1.el9eap, eap8-activemq-artemis-cli 2.40.0-6.redhat_00012.1.el9eap, eap8-activemq-artemis-dto 2.40.0-6.redhat_00012.1.el9eap, eap8-activemq-artemis-server 2.40.0-6.redhat_00012.1.el9eap, eap8-activemq-artemis-commons 2.40.0-6.redhat_00012.1.el9eap, eap8-activemq-artemis-journal 2.40.0-6.redhat_00012.1.el9eap, +9 more
    fixed: vendor fix RHSA-2026:18055
  • Red Hat JBoss Enterprise Application Platform 7.4.25
    fixed: vendor fix RHSA-2026:53806
show 4 more
  • Red Hat JBoss Enterprise Application Platform 8.1.6.GA artemis-server 2.40.0.redhat-00012
    fixed: vendor fix RHSA-2026:18059
  • Red Hat AMQ Clients artemis-server Red Hat JBoss EAP 8.1 for RHEL 8 eap8-angus 2.0.5-1.redhat_00001.1.el8eap, eap8-yasson 3.0.4-5.redhat_00007.1.el8eap, eap8-jctools 4.0.6-1.redhat_00001.1.el8eap, eap8-angus-mail 2.0.5-1.redhat_00001.1.el8eap, eap8-guava 33.0.0-3.jre_redhat_00004.1.el8eap, eap8-wildfly 8.1.6-5.GA_redhat_00007.1.el8eap, +62 more Red Hat JBoss EAP 8.1 for RHEL 9 eap8-angus 2.0.5-1.redhat_00001.1.el9eap, eap8-yasson 3.0.4-5.redhat_00007.1.el9eap, eap8-jctools 4.0.6-1.redhat_00001.1.el9eap, eap8-angus-mail 2.0.5-1.redhat_00001.1.el9eap, eap8-guava 33.0.0-3.jre_redhat_00004.1.el9eap, eap8-wildfly 8.1.6-5.GA_redhat_00007.1.el9eap, +62 more Red Hat JBoss Enterprise Application Platform 8.1.6.GA bla.zip, pom.xml, aesh 2.4, c3 0.6.4, d3 7.4.3, he 1.2.0, +2269 more Red Hat JBoss Enterprise Application Platform Expansion Pack artemis-server Red Hat OpenShift Dev Spaces devspaces/dashboard-rhel9, devspaces/devspaces-operator-bundle
    not affected: vulnerable code not present
  • Red Hat Satellite 6 candlepin, candlepin-selinux
    not affected: inline mitigations already exist
  • Red Hat Single Sign-On 7 artemis-server
    not affected: vulnerable code not in execute path

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-26-134-09 updated cvss 7.1

Siemens Opcenter RDnL

  • Siemens Opcenter RDnL
    affected: vendor fix, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
8 mo ago

Exploit prediction

11.40% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 9.3 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
CISA ADP 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 9.3 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
maven org.apache.activemq:artemis-server
>=2.11.0, <=2.44.0
 no fix listed
maven org.apache.artemis:artemis-server
>=2.50.0, <2.52.0
2.52.0

Affected products

  • Apache Software Foundation Apache Artemis
  • Apache Software Foundation Apache ActiveMQ Artemis
  • Siemens Opcenter RDnL
  • Red Hat Red Hat AMQ Broker 7.12.6
  • Red Hat Red Hat AMQ Broker 7.13.4
  • Red Hat Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9
  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1.7.GA
  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
  • Red Hat Red Hat AMQ Clients
  • Red Hat Red Hat build of OptaPlanner 8
  • Red Hat Red Hat Fuse 7
  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat Red Hat OpenShift Dev Spaces
  • Red Hat Red Hat Process Automation 7
  • Red Hat Red Hat Satellite 6
  • Red Hat Red Hat Single Sign-On 7

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.