Bug 2573500 (CVE-2026-128132)

Summary:	CVE-2026-128132 aiohttp: aiohttp: Denial of Service via excessive WebSocket memory consumption
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in aiohttp. A remote peer or attacker can cause a Denial of Service (DoS) by sending many small or compressed WebSocket messages faster than the application can process them. Because the WebSocket reader fails to properly enforce queue limits when handling these messages, decompressed frames can accumulate rapidly in memory. This issue leads to excessive memory consumption, which can crash the affected client or server.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description OSIDB Bzimport 2026-11-13 20:51:54 UTC

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, the WebSocket reader continues parsing frames already received after the receive queue pauses the transport, and empty messages are not counted toward the queue size. With permessage-deflate, one read of compressed frames can add many megabytes of decompressed messages to the receive queue. A remote peer can send many small or compressed messages faster than the application consumes them and cause excessive memory use in a server or client. This issue is fixed in version 3.14.4.