Bug 2455867 (CVE-2026-33227) - CVE-2026-33227 org.apache.activemq/activemq-client: org.apache.activemq/activemq-broker: org.apache.activemq/activemq-all: org.apache.activemq/activemq-web: improper limitation of a pathname to a restricted classpath directory
Summary: CVE-2026-33227 org.apache.activemq/activemq-client: org.apache.activemq/activ...
Keywords:
Status: NEW
Alias: CVE-2026-33227
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2456081
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-07 09:01 UTC by OSIDB Bzimport
Modified: 2026-04-07 17:24 UTC (History)
31 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-04-07 09:01:25 UTC 
Improper validation and restriction of a classpath path name vulnerability in Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All.

In two instances (when creating a Stomp consumer and also browsing messages in the Web console) an authenticated user provided "key" value could be constructed to traverse the classpath due to path concatenation. As a result, the application is exposed to a classpath path resource loading vulnerability that could potentially be chained together with another attack to lead to exploit.This issue affects Apache ActiveMQ Client: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ Broker: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ All: before 5.19.3, from 6.0.0 before 6.2.2.

Users are recommended to upgrade to version 5.19.4 or 6.2.3, which fixes the issue. Note: 5.19.3 and 6.2.2 also fix this issue, but that is limited to non-Windows environments due to a path separator resolution bug fixed in 5.19.4 and 6.2.3.
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