CVE-2026-41043: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Apache ActiveMQ

This month

MEDIUM 6.5REMOTEWATCHLISTUPGRADEUPGRADE

CVE-2026-41043 is a medium-severity flaw (CVSS 6.5) affecting activemq, activemq web. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Apache ActiveMQ, Apache ActiveMQ Web. An authenticated attacker can show malicious content when browsing queues in the web console by overriding the content type to be HTML (instead of XML) and by injecting HTML into a JMS selector field. This issue affects Apache ActiveMQ: before 5.19.6, from 6.0.0 before 6.2.5; Apache ActiveMQ Web: before 5.19.6, fr

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-79, CWE-915
Published	2026-04-24
Last modified	2026-10-26

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

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-24 11:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

apache activemq UPGRADE

Affected: < 5.19.6 · >= 6.0.0 and < 6.2.5

Fixed in: 5.19.6, 6.2.5

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 5.19.6 (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 web UPGRADE

Affected: < 5.19.6 · >= 6.0.0 and < 6.2.5

Fixed in: 5.19.6, 6.2.5

Safe to downgrade to: a release before 6.0.0

1. Check installed version

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

2. UPGRADE to 5.19.6 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade activemq-web

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-web sudo apt install activemq-web=<VERSION_BEFORE_6.0.0> sudo apt-mark hold activemq-web

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list activemq-web sudo dnf downgrade activemq-web-<VERSION_BEFORE_6.0.0> sudo dnf versionlock add activemq-web

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-2026-41043?

activemq: upgrade to 5.19.6, 6.2.5; activemq web: upgrade to 5.19.6, 6.2.5. Exact commands for each OS are on this page.

Is CVE-2026-41043 being exploited?

CVE-2026-41043 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-2026-41043 affect?

CVE-2026-41043 affects activemq, activemq web. Severity is medium (CVSS 6.5). Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Apache ActiveMQ, Apache ActiveMQ Web. An authenticated attacker can show malicious content when browsing queues in the web console by overriding

How urgent is CVE-2026-41043?

Priority 44/100. Remotely exploitable, no login, no user action; On your watchlist

Software pages

Apache ActiveMQ vulnerabilities

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References

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