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Fencer Vulns
high 7.5

CVE-2026-50750 json

Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire DoS following fix for CVE-2026-49270

published 2026-06-30 4 mo ago modified 2026-11-04 5 d ago also BIT-activemq-2026-50750 , EUVD-2026-40280 , GHSA-9qj4-v6r6-3wmx

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

Denial of Service via Out of Memory vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All.

Following the fix for CVE-2026-49270 an unauthenticated attacker can now cause broker OOM by sending an repeated BrokerInfo commands without sending a ConnectionInfo, until the broker will crash with OOM. This issue affects Apache ActiveMQ Broker: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ All: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7.

Users are recommended to upgrade to version 6.2.7, which fixes the issue.

Patch / fix

  • maven org.apache.activemq:activemq-broker 5.19.8, 6.2.7
  • maven org.apache.activemq:apache-activemq 5.19.8, 6.2.7
  • maven org.apache.activemq:activemq-all 5.19.8, 6.2.7
  • bitnami activemq 5.19.8, 6.2.7
  • Apache Software Foundation Apache ActiveMQ Broker 5.19.8, 6.2.7
  • Apache Software Foundation Apache ActiveMQ 5.19.8, 6.2.7
  • Apache Software Foundation Apache ActiveMQ All 5.19.8, 6.2.7

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-2026-50750 updated cvss 7.5

activemq: Apache ActiveMQ: Denial of Service via repeated BrokerInfo commands

  • Red Hat AMQ Broker 7 artemis-ra, artemis-cli, artemis-dto, artemis-web, artemis-boot, apache-artemis, +27 more Red Hat AMQ Clients artemis-server, artemis-commons, artemis-journal, artemis-selector, artemis-jdbc-store, artemis-core-client, +3 more Red Hat build of Apache Camel for Spring Boot 4 artemis-mqtt-protocol, activemq-artemis-native, artemis-relocations-parent, libartemis-native-linux-i686, libartemis-native-linux-s390x, libartemis-native-linux-x86_64, +2 more Red Hat Data Grid 8 zipkin-sender-activemq-client Red Hat Enterprise Linux 8 log4j, log4j-jcl, log4j-web, log4j-slf4j Red Hat Fuse 7 activeio-core, activemq-http, activemq-mqtt, activemq-osgi, activemq-pool, activemq-karaf, +10 more
    +4 more products
    Red Hat JBoss Enterprise Application Platform 7 wildfly-messaging-activemq Red Hat JBoss Enterprise Application Platform 8 artemis-cli, artemis-dto, artemis-server, artemis-commons, artemis-journal, artemis-selector, +17 more Red Hat Satellite 6 candlepin, candlepin-selinux Red Hat Single Sign-On 7 artemis-ra, artemis-cli, artemis-dto, artemis-tools, artemis-server, artemis-commons, +14 more
    not affected: vulnerable code not present

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 SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.69% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven org.apache.activemq:activemq-broker
>=5.19.7, <5.19.8
>=6.2.6, <6.2.7
5.19.8
6.2.7
maven org.apache.activemq:apache-activemq
>=5.19.7, <5.19.8
>=6.2.6, <6.2.7
5.19.8
6.2.7
maven org.apache.activemq:activemq-all
>=5.19.7, <5.19.8
>=6.2.6, <6.2.7
5.19.8
6.2.7
bitnami activemq
>=5.19.7, <5.19.8
>=6.2.6, <6.2.7
5.19.8
6.2.7

Affected products

  • Apache Software Foundation Apache ActiveMQ Broker
  • Apache Software Foundation Apache ActiveMQ
  • Apache Software Foundation Apache ActiveMQ All

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

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.