Is there a public exploit for CVE-2026-108946?

No public exploit for CVE-2026-108946 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

What does CVE-2026-108946 affect?

CVE-2026-108946 affects Apache Software Foundation ActiveMQ Broker, Apache ActiveMQ.

— Unscored

Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB.

CVE-2026-108946

Improper 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.

Assessment

CVSS: Not yet scored
Severity: Unscored
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 4 November 2026
Last updated: 4 November 2026
Affected: Apache Software Foundation · ActiveMQ Broker · Apache ActiveMQ
Assigner: apache

At the source

EUVD (ENISA)

References

https://lists.apache.org/thread/0spj0m846vhw3cjyfmzsy3l8vxh6f5t6

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