Fluid Attacks Database

Description

Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp. An unauthenticated client that opens a STOMP NIO connection can send header bytes that never terminate which makes the broker buffer them without limit, exhausting the JVM heap. This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Stomp: before 5.19.8, from 6.0.0 before 6.2.7. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version
debian 11	activemq	=5.16.1-1 \|\| =5.16.1-1+deb11u1 \|\| =5.16.1-1+deb11u2 \|\| =5.16.1-2 \|\| =5.17.2+dfsg-1 \|\| =5.17.2+dfsg-2 \|\| =5.17.6+dfsg-1 \|\| =5.17.6+dfsg-2
debian 12	activemq	=5.17.2+dfsg-2 \|\| =5.17.2+dfsg-2+deb12u1 \|\| =5.17.6+dfsg-1 \|\| =5.17.6+dfsg-2
rpm rhel8	log4j	-
debian 13	activemq	=5.17.6+dfsg-2

Aliases

1. CVE-2026-539162. NVD-2026-539163. OSV-DEBIAN-2026-539164. OSV-2026-539165. SECURITY-TRACKER-CVE-2026-53916

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