CVE-2026-34197: Apache ActiveMQ Jolokia MBean code injection (authenticated RCE)

Exploited in the wild High 8.8 EPSS 98.3% Apache ActiveMQ

ActiveMQ Classic exposes the Jolokia JMX-HTTP bridge at /api/jolokia/ on the web console, and its default policy allows exec operations such as BrokerService.addNetworkConnector; an authenticated attacker can pass a crafted discovery URI that loads a remote Spring XML context and runs code in the broker's JVM. Fixed in 5.19.4 and 6.2.3 (7 April 2026); CISA added it to KEV on 16 April 2026.

CVE-2026-34197CVE identifier
8.8CVSS 3.1 base score (high)
2026-04-16added to CISA's exploited list (US federal deadline 2026-04-30)
98.3%EPSS: chance of exploitation in the next 30 days (higher than 100% of CVEs)
2026-04-07published

What do these terms mean? CVE · CVSS score · exploited (KEV) · EPSS · backported fix · all terms

What to do now

Check whether you run Apache ActiveMQ and which version (commands below).
Install the fixed version for your system: see “Patch it” below.
Restart the ActiveMQ broker.
If you cannot patch today, apply the temporary mitigation below and patch as soon as possible.
Because this flaw is being exploited, also check the server for signs of compromise.

Affected and fixed versions

Affected:

Apache ActiveMQ before 5.19.4
Apache ActiveMQ 6.0.0 before 6.2.3

Fixed in:

Apache ActiveMQ 5.19.4
Apache ActiveMQ 6.2.3

Am I affected?

ls $ACTIVEMQ_HOME/lib | grep activemq-broker
dpkg -l activemq | grep ^ii   # Debian/Ubuntu package (no fix yet)

Patch it

Use the commands for your system. Distribution packages often keep an older version number with the fix backported, so compare with the fixed package versions in the table below, not only with the upstream version.

Debian

sudo apt update
sudo apt install --only-upgrade activemq

Ubuntu

sudo apt update
sudo apt install --only-upgrade activemq

RHEL, AlmaLinux, Rocky, Oracle

not packaged: upstream tarball

Fedora

not packaged

SUSE / openSUSE

not packaged

Amazon Linux

not packaged: Amazon MQ is managed

Arch Linux

not in official repos

Alpine

not packaged

FreeBSD

pkg update && pkg upgrade activemq

Docker images

# switch to an image built on ActiveMQ 5.19.4+ or 6.2.3+, then recreate the container

Built from source

# install Apache ActiveMQ 5.19.4+ or 6.2.3+ from https://activemq.apache.org/ and restart the broker

General update steps for every system are on the Linux and Unix & BSD pages; after updating, see which services to restart.

Fix status in Linux distributions

Release	Package	Status	Fixed version / advisory
Debian 12	`activemq`	not fixed yet
Debian 13	`activemq`	not fixed yet

From the Debian security tracker, Ubuntu CVE tracker and Red Hat Security Data API, refreshed every few hours.

If you cannot patch yet

Debian lists its bookworm and trixie activemq packages as vulnerable and Ubuntu has not yet triaged its packages, so use the upstream release.
The flaw is reached through the web console's Jolokia endpoint (/api/jolokia/); keep the web console off untrusted networks.

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

https://activemq.apache.org/security-advisories.data/CVE-2026-34197-announcement.txt ; https://nvd.nist.gov/vuln/detail/CVE-2026-34197

Sources

Page generated automatically from official sources on 2026-11-03 18:05 UTC and reviewed by an editor. Always confirm with your vendor's advisory.