CVE-2026-59878 — Apache ActiveMQ AMQP, Apache ActiveMQ, Apache ActiveMQ All: AMQP NIO negative frame size validation bypass leading to…

Description (CNA)

Improper Input Validation vulnerability in Apache ActiveMQ AMQP, Apache ActiveMQ, Apache ActiveMQ All. A remote unauthenticated peer that can reach an exposed AMQP NIO connector can trigger denial-of-service behavior by sending a frame size value. This cause the NIO threads to die and if done rapidly enough can lead to exhaustion of the NIO thread pool denying service to other connections. This issue affects Apache ActiveMQ AMQP: before 5.19.9, from 6.0.0 before 6.2.8; Apache ActiveMQ: before 5.19.9, from 6.0.0 before 6.2.8; Apache ActiveMQ All: before 5.19.9, from 6.0.0 before 6.2.8. Users are recommended to upgrade to version 5.19.9, 6.2.8, or 6.3.0 which fixes the issue.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache ActiveMQ AMQP	affected 0 before 5.19.9; affected 6.0.0 before 6.2.8
Apache Software Foundation / Apache ActiveMQ	affected 0 before 5.19.9; affected 6.0.0 before 6.2.8
Apache Software Foundation / Apache ActiveMQ All	affected 0 before 5.19.9; affected 6.0.0 before 6.2.8

CWE

CWE-20

References

https://lists.apache.org/thread/dnyx4d2oldshcj4lthso7b53y4bqmjvn

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/07/27/7

CISA-ADP

No English description supplied.

No references supplied.