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CVE-2026-33227

Affected software3 products, listed below
Severity4.3 Medium CVSS 3.1
Fixed in5.19.3, 6.2.2
WeaknessPath traversal (CWE-22)
Published7 Apr 2026
Updated26 Oct 2026

Description

Improper validation and restriction of a classpath path name vulnerability in Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ. 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; Apache ActiveMQ Web: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ: 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.

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.43% chance in 30 days

Waratek protection

Protected by Waratek

Waratek has a rule that blocks attacks on this vulnerability.

Decided by A vulnerability class already blocked by an ARMR security rule
Finding Protected by Waratek's ARMR path-traversal security rule, which blocks this class of attack at the JVM level without a rule written for this CVE specifically. The CVE's weakness is CWE-22: Path Traversal.

How to mitigate CVE-2026-33227

Upgrade the affected software to a release that fixes it: 5.19.3 or 6.2.2. Until you can, Waratek RASP blocks exploitation with its path traversal rule. It runs inside the Java application, with no code changes.

Waratek RASP Runtime protection for Java applications

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.apache.activemq:activemq-client 0 5.19.3 unbounded
org.apache.activemq:activemq-client 6.0.0 6.2.2 unbounded
org.apache.activemq:activemq-broker 0 5.19.3 unbounded
org.apache.activemq:activemq-broker 6.0.0 6.2.2 unbounded
org.apache.activemq:activemq-all 0 5.19.3 unbounded
org.apache.activemq:activemq-all 6.0.0 6.2.2 unbounded
org.apache.activemq:activemq-web 0 5.19.3 unbounded
org.apache.activemq:activemq-web 6.0.0 6.2.2 unbounded

Products and versions

7 products, 14 version entries
SourceVendorProductSchemeAffected versions
nvd apache activemq generic < 5.19.3 · ≥ 6.0.0 and < 6.2.2
nvd apache activemq broker generic < 5.19.3 · ≥ 6.0.0 and < 6.2.2
nvd apache activemq web generic < 5.19.3 · ≥ 6.0.0 and < 6.2.2
osv org.apache.activemq activemq-all generic < 5.19.3 · ≥ 6.0.0 and < 6.2.2
osv org.apache.activemq activemq-broker generic < 5.19.3 · ≥ 6.0.0 and < 6.2.2
osv org.apache.activemq activemq-client generic < 5.19.3 · ≥ 6.0.0 and < 6.2.2
osv org.apache.activemq activemq-web generic < 5.19.3 · ≥ 6.0.0 and < 6.2.2

References

URLTags
https://activemq.apache.org/security-advisories.data/CVE-2026-33227-announcement.txt WEB
https://github.com/apache/activemq PACKAGE
http://www.openwall.com/lists/oss-security/2026/04/06/4 WEB

Timeline

Published2026-04-07By the CVE Program.
NVD record modified2026-10-26NVD's own last-modified date for this record.