Fluid Attacks Database

Description

Denial of Service via Out of Memory vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All. Following the fix for CVE-2026-49270 an unauthenticated attacker can now cause broker OOM by sending an repeated BrokerInfo commands without sending a ConnectionInfo, until the broker will crash with OOM. This issue affects Apache ActiveMQ Broker: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ All: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7. Users are recommended to upgrade to version 6.2.7, 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
debian 13	activemq	=5.17.6+dfsg-2

Aliases

1. CVE-2026-507502. NVD-2026-507503. OSV-DEBIAN-2026-507504. OSV-2026-507505. SECURITY-TRACKER-CVE-2026-50750

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