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Fencer Vulns
high 7.5

CVE-2026-49432 json

Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: STOMP negative content-length enables denial of service

published 2026-06-30 4 mo ago modified 2026-11-05 3 d ago also BIT-activemq-2026-49432 , EUVD-2026-40284 , GHSA-xjwq-9jw5-jf7w

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

Improper Input Validation vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp.

A remote unauthenticated peer that can reach an exposed STOMP connector can trigger denial-of-service behavior by sending a negative content-length. For the NIO STOMP transport, an attacker can keep streaming body bytes and grow the per-connection command buffer beyond configured limits to cause OOM. For the blocking STOMP protocol, an error will instead force abnormal transport exception handling for the affected connection and closure. 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 Stomp: 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-stomp 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 Stomp 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-2026-49432 updated cvss 7.5

org.apache.activemq/activemq: org.apache.activemq/activemq-all: org.apache.activemq/activemq-stomp: Apache ActiveMQ: Denial of Service via improper input validation in STOMP connector

  • Red Hat AMQ Broker 7 artemis-ra, artemis-cli, artemis-dto, artemis-web, artemis-boot, apache-artemis, +26 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, +11 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 AMQ Broker 7.13.6
    fixed: vendor fix RHSA-2026:66545
  • Red Hat AMQ Broker 7.14.1
    fixed: vendor fix RHSA-2026:66488

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

0.78% chance of exploitation in the next 30 days, higher than 56% 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: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-stomp
<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 Stomp

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-839 Numeric Range Comparison Without Minimum Check

References

Sources

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