Apache ActiveMQ, Apache ActiveMQ KahaDB: Oversized client identifier strings poison the KahaDB journal

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-111821
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-04 10:17:25 UTC
Updated2026-11-04 10:17:25 UTC
DescriptionImproper 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.

Risk And Classification

Problem Types: CWE-20 | CWE-20 CWE-20 Improper input validation

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache ActiveMQ affected 6.0.0 6.3.3 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ affected 5.19.12 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ KahaDB affected 6.0.0 6.3.3 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ KahaDB affected 5.19.12 semver Not specified

References

ReferenceSourceLinkTags
lists.apache.org/thread/p8gxq66lmztkrls74wkz3xh9chqd0pwl [email protected] lists.apache.org
www.openwall.com/lists/oss-security/2026/11/03/19 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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