CVE-2026-49434: Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All: LdapNetworkConnector instantiates denied transports and a remote-properties broker

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-30 · updated 2026-07-02
Weakness: CWE-20

Description

Improper Input Validation vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All. An attacker that has access to publish or modify entries in LDAP that match the configured searchBase and searchFilter can instantiate denied transports inside the broker JVM. This can be used to fetch an attacker URL and spawn a second BrokerService inside the same JVM. This issue affects Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.

Affected products

Apache ActiveMQ: before 5.19.8; from 6.0.0 before 6.2.7 — fixed in 5.19.8, 6.2.7
Apache Activemq Broker: before 5.19.8; from 6.0.0 before 6.2.7 — fixed in 5.19.8, 6.2.7

How to fix

Upgrade to a fixed version: Apache ActiveMQ 5.19.8, 6.2.7; Apache Activemq Broker 5.19.8, 6.2.7. Check the vendor advisory for mitigations.

References

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