PT-2026-30804 · Apache · Apache Activemq+3

Dawei Wang · Published 2026-04-07 · Updated 2026-04-07 · CVE-2026-33227

NVD

CVSS v3.1

4.3

Medium

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-33227

Affected Products

Apache Activemq

Apache Activemq Broker

Apache Activemq Client

Apache Activemq Web

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-33227 · Security Note
• https://activemq.apache.org/security-advisories.data/CVE-2026-33227-announcement.txt · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2041473637098615185 · Twitter Post
• http://openwall.com/lists/oss-security/2026/04/06/4 · Note