Bug 2494846 (CVE-2026-53916)

Summary:	CVE-2026-53916 activemq-stomp: Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: Unbounded header buffer in STOMP NIO codec
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	anthomas, anujha, aschwart, asoldano, aszczucz, ataylor, bbaranow, bmaxwell, boliveir, bstansbe, csuconic, dbruscin, dlofthou, drichtar, ehelms, ehugonne, fmariani, ggainey, gmalinko, gtanzill, gtully, istudens, ivassile, iweiss, janstey, jbuscemi, jpasqual, jsherman, juwatts, jwon, kvanderr, mcarlett, mdellweg, mhulan, mosmerov, mposolda, msvehla, nmoumoul, nwallace, osousa, pberan, pcreech, pdelbell, pesilva, pjindal, pmackay, rchan, rgemmell, rgodfrey, rhel-process-autobot, rmartinc, rstancel, rstepani, smallamp, ssilvert, sthorger, tbish, tcunning, thjenkin, tlavocat, tmalecek, vdosoudi, vmuzikar, watson-tool-maintainers, yfang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	An unbounded memory allocation flaw was found in the STOMP NIO codec of Apache ActiveMQ Classic. An unauthenticated remote client can open a STOMP NIO connection and send an unterminated header, causing the broker to buffer input without limit and potentially exhaust the JVM heap, resulting in a denial of service. This affects Apache ActiveMQ Classic before 5.19.8 and versions 6.0.0 before 6.2.7, including the activemq-stomp and activemq-all artifacts.	Story Points:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2495086, 2495087
Bug Blocks:

Description OSIDB Bzimport 2026-06-30 11:02:35 UTC

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.

Comment 5 errata-xmlrpc 2026-09-10 16:37:05 UTC

This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.14.1

Via RHSA-2026:66488 https://access.redhat.com/errata/RHSA-2026:66488

Comment 6 errata-xmlrpc 2026-09-10 23:25:08 UTC

This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.13.6

Via RHSA-2026:66545 https://access.redhat.com/errata/RHSA-2026:66545