CVE-2026-59878

HIGH

Apache ActiveMQ AMQP - Unauthenticated NIO Denial of Service

Title source: manual
STIX 2.1

Description

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.

References (2)

Core 2

Scores

CVSS v3 7.5
EPSS 0.0055
EPSS Percentile 42.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (6)
Apache Software Foundation/Apache ActiveMQ < 5.19.9
Apache Software Foundation/Apache ActiveMQ 6.0.0 - 6.2.8
Apache Software Foundation/Apache ActiveMQ All < 5.19.9
Apache Software Foundation/Apache ActiveMQ All 6.0.0 - 6.2.8
Apache Software Foundation/Apache ActiveMQ AMQP < 5.19.9
Apache Software Foundation/Apache ActiveMQ AMQP 6.0.0 - 6.2.8
Published Jul 28, 2026
Tracked Since Jul 28, 2026