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Fencer Intel
high 7.5

CVE-2026-53917 json

Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker: Unbounded memory allocation in OpenWire property unmarshalling

published 4mo ago modified 7d ago also BIT-activemq-2026-53917 , EUVD-2026-40277 , GHSA-f77w-px59-cqf5

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 55%
public exploits
0
none known

Summary

Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker.

An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker. This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7.

Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.

Patch / fix

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

Is CVE-2026-53917 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2026-53917 updated cvss 6.5

activemq: activemq-all: activemq-client: activemq-broker: Apache ActiveMQ: Denial of Service via crafted OpenWire Message

  • 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
    affected: workaround, no fix available “Fix deferred”

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
4mo ago

Exploit prediction

0.74% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-11).

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:apache-activemq
<5.19.8
>=6.0.0, <6.2.7
5.19.8
6.2.7
maven org.apache.activemq:activemq-all
<5.19.8
>=6.0.0, <6.2.7
5.19.8
6.2.7
maven org.apache.activemq:activemq-client
<5.19.8
>=6.0.0, <6.2.7
5.19.8
6.2.7
maven org.apache.activemq:activemq-broker
<5.19.8
>=6.0.0, <6.2.7
5.19.8
6.2.7
bitnami activemq
<5.19.8
>=6.0.0, <6.2.7
5.19.8
6.2.7

Affected products

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

Classification

Weakness
  • CWE-789 Memory Allocation with Excessive Size Value

References

Sources

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