Medium 6.1Published Jun 1, 2026

CVE-2026-42253Apache ActiveMQ, Apache ActiveMQ Web: HTTP Response Header Injection via JMS Message Properties

Updated under an hour ago (Oct 28, 2026, 4:10 AM ET)

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It affects Apache Software Foundation Apache ActiveMQ and 3 other products. Add what you run to find out whether that includes you.

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Every CVE for Apache Software Foundation Apache ActiveMQ

Exploited in the last 30 days

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache ActiveMQ, Apache ActiveMQ Web. The MessageServlet in the ActiveMQ web console API copies every JMS message property into an HTTP response header without any validation. This can allow overwriting and injecting security headers by setting them on JMS messages that are returned by the servlet. This issue affects Apache ActiveMQ: before 5.19.7, from 6.0.0 before 6.2.6; Apache ActiveMQ Web: before 5.19.7, from 6.0.0 before 6.2.6. Users are recommended to upgrade to version 5.19.7 or 6.2.6, which fixes the issue. The MessageServlet has now been deprecated and disabled by default.

CVSS: 6.1 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: Jun 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache ActiveMQ apache_software_foundation:apache_activemq (from the name)	before 5.19.7; from 6.0.0 before 6.2.6	CNA record
Apache Software Foundation Apache ActiveMQ Web apache_software_foundation:apache_activemq_web (from the name)	before 5.19.7; from 6.0.0 before 6.2.6	CNA record
apache activemq apache:activemq	before 5.19.7; from 6.0.0 before 6.2.6	NVD
apache activemq_web apache:activemq_web	before 5.19.7; from 6.0.0 before 6.2.6	NVD

References

References

https://lists.apache.org/thread/j9vmlc410ht5f28fc98gx75jcbq62j00	vendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/05/31/17	mailing-list, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.