CVE-2026-53916

Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: Unbounded header buffer in STOMP NIO codec

State: Published
Severity: 7.5 High
Published: Jun 30, 2026
Updated: Jun 30, 2026
Reserved: Jun 11, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-789 Memory Allocation with Excessive Size Value

Affected Products

Product	Versions
Apache ActiveMQApache Software Foundation	before 5.19.8Affected 6.0.0 to before 6.2.7Affected
Apache ActiveMQ AllApache Software Foundation	before 5.19.8Affected 6.0.0 to before 6.2.7Affected
Apache ActiveMQ StompApache Software Foundation	before 5.19.8Affected 6.0.0 to before 6.2.7Affected

References

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