PT-2026-30804 · Apache+1 · Apache Activemq+3

Dawei Wang · CVE-2026-33227 · Published 2026-04-07 · Updated 2026-07-27

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Apache ActiveMQ Client versions prior to 5.19.3, from 6.0.0 through 6.2.2 Apache ActiveMQ Broker versions prior to 5.19.3, from 6.0.0 through 6.2.2 Apache ActiveMQ All versions prior to 5.19.3, from 6.0.0 through 6.2.2

Description An improper validation and restriction of a classpath path name issue exists in Apache ActiveMQ Client, Broker, and All. An authenticated user-supplied 'key' value can be crafted to traverse the classpath due to path concatenation, potentially leading to a classpath path resource loading issue that could be chained with another attack.

Recommendations Upgrade to version 5.19.4 or 6.2.3 to resolve the issue. Note that versions 5.19.3 and 6.2.2 also address this issue, but only in non-Windows environments.

Exploit

Fix

DoS

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

BIT-ACTIVEMQ-2026-33227

CVE-2026-33227

GHSA-H2H4-5M64-M273

OESA-2026-2124

OESA-2026-2125

OESA-2026-2126

OESA-2026-2127

Affected Products

Apache Activemq

Apache Activemq Broker

Apache Activemq Client

Red Os

References · 33

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33227.json · Exploit
• https://osv.dev/vulnerability/BIT-activemq-2026-33227 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-h2h4-5m64-m273 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2124 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-APP-MAVEN-CVE-2026-33227 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2126 · Vendor Advisory
• https://activemq.apache.org/security-advisories.data/CVE-2026-33227-announcement.txt · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33227 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-33227 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2127 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40466 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-40046 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-33227 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-39304 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-41044 · Security Note