CVE-2026-41043Network attack vector

Authenticated XSS via HTML content-type override

Published Apr 24, 2026 · Updated Apr 24, 2026

Cross-site scripting in Apache ActiveMQ and ActiveMQ Web before 5.19.6 and 6.0.0 through 6.2.4 lets authenticated attackers show malicious content. The web console's queue-browsing response accepts an HTML content-type override and renders injected JMS selector markup without neutralization. Access requires an authenticated console session, and browsing the affected queue exposes the console browser to attacker-supplied script content.

CVSS severity6.5
Medium
EPSS probability0.56%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Apache ActiveMQ and ActiveMQ Web before 5.19.6 and 6.0.0 through 6.2.4 lets authenticated attackers show malicious content. The web console's queue-browsing response accepts an HTML content-type override and renders injected JMS selector markup without neutralization. Access requires an authenticated console session, and browsing the affected queue exposes the console browser to attacker-supplied script content.

The record

CVE
CVE-2026-41043
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Apache Software Foundation
Product
Apache ActiveMQ Web
Classifications
CWE-915, CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.19.6
  2. Affected versionversion=6.0.0 <6.2.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache ActiveMQ Webversion=0 <5.19.6; version=6.0.0 <6.2.5
The Apache Software Foundation · Apache ActiveMQversion=0 <5.19.6; version=6.0.0 <6.2.5

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-915Improperly Controlled Modification of Dynamically-Determined Object Attributes
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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