CVE-2026-111821
Apache ActiveMQ, Apache ActiveMQ KahaDB: Oversized client identifier strings poison the KahaDB journal
Description
Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB. A user can create a durable subscription with a clientId and subscription name that have a combined length > 65,535 (while separately being shorter) on a broker using KahaDB which can cause the broker to shutdown and be unrecoverable. This issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12. Users are recommended to upgrade to version 6.4.0, 6.3.3 or 5.19.12, which fixes the issue.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache ActiveMQ | 6.0.0 to <6.3.3; <5.19.12 |
| Apache Software Foundation | Apache ActiveMQ KahaDB | 6.0.0 to <6.3.3; <5.19.12 |
References
External links from the record. They lead to third-party sites.