Input validation error in ActiveMQ - CVE-2026-49434
Published: July 1, 2026
Vulnerability identifier: #VU136618
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-49434
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Apache Foundation
Affected software:
ActiveMQ
ActiveMQ
Detailed vulnerability description
The vulnerability allows a remote user to instantiate denied transports inside the broker JVM and spawn a second BrokerService in the same JVM.
The vulnerability exists due to improper input validation in LdapNetworkConnector when processing LDAP entries that match the configured searchBase and searchFilter. A remote user can publish or modify matching LDAP entries to instantiate denied transports inside the broker JVM and spawn a second BrokerService in the same JVM.
Exploitation can be used to fetch an attacker-controlled URL.
How to mitigate CVE-2026-49434
Install security update from vendor's website.