Apache ActiveMQ, ActiveMQ Broker: The broker does not verify user provided connection id matches connection

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-108946
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-04 11:17:13 UTC
Updated2026-11-04 11:17:13 UTC
DescriptionImproper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB. The ActiveMQ broker resolves connection, session and consumer state from ids that are user provided and in some scenarios does not validate that they ids are bound to that user. This allows an authenticated client to spoof another user's ids. This allows: *  an authenticated client consumes from another connection's temporary queue/topic by putting the victim's connection id in its own ConsumerId, bypassing the broker-side ownership check.  * a duplicate ConsumerId registration is only logged, after which the attacker's RemoveInfo or disconnect tears down the victim's live subscription * a forged MessageAck for the victim's ConsumerId permanently deletes an in-flight, unacknowledged message. 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 ActiveMQ Broker affected 6.0.0 6.3.3 semver Not specified
CNA Apache Software Foundation ActiveMQ Broker affected 5.19.12 semver Not specified

References

ReferenceSourceLinkTags
lists.apache.org/thread/0spj0m846vhw3cjyfmzsy3l8vxh6f5t6 [email protected] lists.apache.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: zerovuln labs <[email protected]> (en)

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