Bug 2499205 (CVE-2026-57212)

Summary:	CVE-2026-57212 rabbitmq-server: RabbitMQ: Denial of Service via oversized JSON bodies in HTTP API
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	eglynn, jjoyce, jpretori, jschluet, lhh, mburns, mgarciac
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in RabbitMQ, a messaging and streaming broker. A remote attacker could exploit this vulnerability by sending oversized JSON bodies to the rabbitmq_management HTTP API. The API's body size check is incomplete, allowing the final combined size to exceed limits. This could lead to a Denial of Service (DoS) due to excessive resource consumption.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2507939
Bug Blocks:

Description OSIDB Bzimport 2026-07-10 21:01:27 UTC

RabbitMQ is a messaging and streaming broker. Prior to 3.13.14, 4.0.19, 4.1.10, and 4.2.5, the rabbitmq_management HTTP API accepts oversized valid JSON bodies on with_decode and direct_request paths because read_complete_body checks the accumulated size before the final chunk but not the final combined size. This issue is fixed in versions 3.13.14, 4.0.19, 4.1.10, and 4.2.5.