CVE-2026-50750: Denial of Service via Out of Memory vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ

This month

HIGH 7.5REMOTEWATCHLISTDOWNGRADEDOWNGRADE

CVE-2026-50750 is a high-severity flaw (CVSS 7.5) affecting activemq, activemq broker. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 befo

Why this priority

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

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-400
Published	2026-06-30
Last modified	2026-07-02

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-07-02 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-30 11:16 UTCPublished CVE record published
2026-07-02 18:42 UTCUpdated Record last modified

apache activemq DOWNGRADE

Affected: 5.19.7 · 6.2.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.19.7

1. Check installed version

apt-cache policy activemq || rpm -q activemq || activemq --version

2. No fixed release: DOWNGRADE to a release before 5.19.7 (Debian / Ubuntu)

apt-cache madison activemq sudo apt install activemq=<VERSION_BEFORE_5.19.7> sudo apt-mark hold activemq

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list activemq sudo dnf downgrade activemq-<VERSION_BEFORE_5.19.7> 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 broker DOWNGRADE

Affected: 5.19.7 · 6.2.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.19.7

1. Check installed version

apt-cache policy activemq-broker || rpm -q activemq-broker || activemq-broker --version

2. No fixed release: DOWNGRADE to a release before 5.19.7 (Debian / Ubuntu)

apt-cache madison activemq-broker sudo apt install activemq-broker=<VERSION_BEFORE_5.19.7> sudo apt-mark hold activemq-broker

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list activemq-broker sudo dnf downgrade activemq-broker-<VERSION_BEFORE_5.19.7> 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-2026-50750?

activemq: downgrade or apply the listed mitigation; activemq broker: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-50750 being exploited?

CVE-2026-50750 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-2026-50750 affect?

CVE-2026-50750 affects activemq, activemq broker. Severity is high (CVSS 7.5). 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

How urgent is CVE-2026-50750?

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

Software pages

Apache ActiveMQ vulnerabilities

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References

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