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CVE-2026-74761: Improper input validation in TopicRegion in Apache ActiveMQ, Apache ActiveMQ Broker, and Apache ActiveMQ All o

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This month
HIGH 7.5REMOTEWATCHLISTUPGRADEUPGRADEUPGRADE

CVE-2026-74761 is a high-severity flaw (CVSS 7.5) affecting activemq, activemq all, activemq broker. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper input validation in TopicRegion in Apache ActiveMQ, Apache ActiveMQ Broker, and Apache ActiveMQ All on all platforms. An authenticated client can spoof clientId when removing a durable topic subscription. This issue affects Apache ActiveMQ Broker: before 5.19.11, from 6.0.0 before 6.3.2; Apache ActiveMQ All: before 5.19.11, from 6.0.0 before 6.3.2; Apache ActiveMQ: before 5.19.11, from 6.0.0 before 6.3.2. Users are recommended

Why this priority

  • High severity
  • Remotely exploitable, no login, no user action
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.6% (top 50%)
CISA exploited listNo
WeaknessCWE-20
Published2026-09-09
Last modified2026-09-18
Publisher (CNA): Apache Software Foundation · Vendor: apache

Share: LinkedIn · X · Reddit

Last updated 2026-09-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

apache activemq UPGRADE
Affected: < 5.19.11 · >= 6.0.0 and < 6.3.2
Fixed in: 5.19.11, 6.3.2
Safe to downgrade to: a release before 6.0.0
1. Check installed version
apt-cache policy activemq || rpm -q activemq || activemq --version
2. UPGRADE to 5.19.11 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade activemq
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade activemq
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 6.0.0 (Debian / Ubuntu)
apt-cache madison activemq sudo apt install activemq=<VERSION_BEFORE_6.0.0> sudo apt-mark hold activemq
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list activemq sudo dnf downgrade activemq-<VERSION_BEFORE_6.0.0> sudo dnf versionlock add activemq
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
apache activemq all UPGRADE
Affected: < 5.19.11 · >= 6.0.0 and < 6.3.2
Fixed in: 5.19.11, 6.3.2
Safe to downgrade to: a release before 6.0.0
1. Check installed version
apt-cache policy activemq-all || rpm -q activemq-all || activemq-all --version
2. UPGRADE to 5.19.11 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade activemq-all
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade activemq-all
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 6.0.0 (Debian / Ubuntu)
apt-cache madison activemq-all sudo apt install activemq-all=<VERSION_BEFORE_6.0.0> sudo apt-mark hold activemq-all
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list activemq-all sudo dnf downgrade activemq-all-<VERSION_BEFORE_6.0.0> sudo dnf versionlock add activemq-all
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
apache activemq broker UPGRADE
Affected: < 5.19.11 · >= 6.2.0 and < 6.3.2
Fixed in: 5.19.11, 6.3.2
Safe to downgrade to: a release before 6.2.0
1. Check installed version
apt-cache policy activemq-broker || rpm -q activemq-broker || activemq-broker --version
2. UPGRADE to 5.19.11 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade activemq-broker
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade activemq-broker
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 6.2.0 (Debian / Ubuntu)
apt-cache madison activemq-broker sudo apt install activemq-broker=<VERSION_BEFORE_6.2.0> sudo apt-mark hold activemq-broker
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list activemq-broker sudo dnf downgrade activemq-broker-<VERSION_BEFORE_6.2.0> sudo dnf versionlock add activemq-broker
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-74761?

activemq: upgrade to 5.19.11, 6.3.2; activemq all: upgrade to 5.19.11, 6.3.2; activemq broker: upgrade to 5.19.11, 6.3.2. Exact commands for each OS are on this page.

Is CVE-2026-74761 being exploited?

CVE-2026-74761 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-74761 affect?

CVE-2026-74761 affects activemq, activemq all, activemq broker. Severity is high (CVSS 7.5). Improper input validation in TopicRegion in Apache ActiveMQ, Apache ActiveMQ Broker, and Apache ActiveMQ All on all platforms. An authenticated client can spoof clientId when removing a durable topic subscription. This issue affects

How urgent is CVE-2026-74761?

Priority 49/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Apache ActiveMQ vulnerabilities

Related CVEs

References

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