Bug 2494847 (CVE-2026-49432)

Summary:	CVE-2026-49432 org.apache.activemq/activemq: org.apache.activemq/activemq-all: org.apache.activemq/activemq-stomp: Apache ActiveMQ: Denial of Service via improper input validation in STOMP connector
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, dbruscin, dlofthou, drichtar, ehelms, ehugonne, fmariani, ggainey, gmalinko, gtanzill, istudens, ivassile, iweiss, janstey, jbuscemi, jpasqual, juwatts, jwon, kvanderr, mcarlett, mhulan, mosmerov, mposolda, msvehla, nmoumoul, nwallace, osousa, pberan, pcreech, pdelbell, pesilva, pjindal, pmackay, rchan, rhel-process-autobot, rmartinc, rstancel, rstepani, smallamp, ssilvert, sthorger, tcunning, thjenkin, 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:	A flaw was found in Apache ActiveMQ. A remote, unauthenticated attacker can exploit an improper input validation vulnerability by sending a specially crafted message with a negative content-length to an exposed STOMP connector. This can lead to a denial of service (DoS) condition, either by consuming excessive memory and causing an Out-Of-Memory (OOM) error or by forcing the abnormal closure of affected connections.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2495072, 2495073
Bug Blocks:

Description OSIDB Bzimport 2026-06-30 11:02:43 UTC

Improper Input Validation vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp.

A remote unauthenticated peer that can reach an exposed STOMP connector can trigger denial-of-service behavior by sending a negative content-length. For the NIO STOMP transport, an attacker can keep streaming body bytes and grow the per-connection command buffer beyond configured limits to cause OOM. For the blocking STOMP protocol, an error will instead force abnormal transport exception handling for the affected connection and closure.
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.