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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 and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache ActiveMQ 6.0 | 6.0.0 → < 6.3.3 | 6.3.3 |
| Apache ActiveMQ 5.19 | earliest → < 5.19.12 | 5.19.12 |
| Apache ActiveMQ KahaDB 6.0 | 6.0.0 → < 6.3.3 | 6.3.3 |
| Apache ActiveMQ KahaDB 5.19 | earliest → < 5.19.12 | 5.19.12 |
References
- lists.apache.org lists.apache.org
Timeline
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