CVE-2026-111821
HIGH
MEDIUM
Priority: 0.04
BB Relevance:
75/100
Published: 2026-11-04
Modified: 2026-11-10
First seen: 2026-11-04
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
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.
Weakness Classification (1)
Affected Software (8)
| Vendor | Product | Version |
|---|---|---|
| Apache Software Foundation | Apache ActiveMQ | 6.0.0 < 6.3.3 |
| Apache Software Foundation | Apache ActiveMQ | 0 < 5.19.12 |
| Apache Software Foundation | Apache ActiveMQ | 6.0.0 < 6.3.3 |
| Apache Software Foundation | Apache ActiveMQ | 0 < 5.19.12 |
| Apache Software Foundation | Apache ActiveMQ KahaDB | 6.0.0 < 6.3.3 |
| Apache Software Foundation | Apache ActiveMQ KahaDB | 0 < 5.19.12 |
| Apache Software Foundation | Apache ActiveMQ KahaDB | 6.0.0 < 6.3.3 |
| Apache Software Foundation | Apache ActiveMQ KahaDB | 0 < 5.19.12 |