Medium severity · published Jul 28, 2026
CVE-2026-61487
Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Authorization bypass via temporary composite destinations
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
Improper Authorization vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ.
An authenticated low-privilege user can bypass a per-destination
write ACL by sending to an ActiveMQ temporary composite destination whose physical name is a
comma-separated composite of real queues. This allows publishing messages to any of the destinations in the list without proper write ACL permissions because the authorization check is bypassed due to the composite destination being marked as temporary.
This issue affects Apache ActiveMQ Broker: before 5.19.9, from 6.0.0 before 6.2.8; Apache ActiveMQ All: before 5.19.9, from 6.0.0 before 6.2.8; Apache ActiveMQ: before 5.19.9, from 6.0.0 before 6.2.8.
Users are recommended to upgrade to version 5.19.9, 6.2.8 or 6.3.0, which fixes the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
ActiveMQ · Apache
before 5.19.9; 6.0.0 before 6.2.8 · source: vendor, NVD
AA
Apache ActiveMQ All · Apache Software Foundation
before 5.19.9; 6.0.0 before 6.2.8 · source: vendor
AA
Apache ActiveMQ Broker · Apache Software Foundation
before 5.19.9; 6.0.0 before 6.2.8 · source: vendor
AA
Activemq All · Apache
before 5.19.9; 6.0.0 before 6.2.8 · source: NVD
AB
Activemq Broker · Apache
before 5.19.9; 6.0.0 before 6.2.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-61487
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-61487
Mailing List
https://lists.apache.org/thread/6rwn6cq65dy4lhmsmjf2bxnhbmhkcswz
Mailing List
http://www.openwall.com/lists/oss-security/2026/07/27/8
More from ActiveMQ
9.8
CVE-2023-46604
Apache ActiveMQ, Apache ActiveMQ Legacy OpenWire Module: Unbounded deserialization causes ActiveMQ to be vulnerable to a remote code execution (RCE) attack
9.8
CVE-2016-3088
The Fileserver web application in Apache ActiveMQ 5.x before 5.14.0 allows remote attackers to upload and execute arbitrary files via an HTTP PUT followed by an HTTP MOVE request
8.8
CVE-2026-34197
Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Authenticated users could perform RCE via Jolokia MBeans
9.9
CVE-2021-21345
XStream is vulnerable to a Remote Command Execution attack
9.8
CVE-2021-21350
XStream is vulnerable to an Arbitrary Code Execution attack