Bug 2519530

Summary: CVE-2026-69243 python-aiohttp: AIOHTTP: HTTP Request Smuggling via WebSocket Upgrade [fedora-all]
Product: [Fedora] Fedora Reporter: Yadnyawalk Tale <ytale>
Component: python-aiohttpAssignee: Jonathan Wright <jonathan>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: igor.raits, jonathan, mail, python-packagers-sig
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["e9a7d1b6-1334-40f7-a24b-d52e830e98c4"]}
Fixed In Version: python-aiohttp-3.14.3-3.fc46 python-aiohttp-3.14.3-3.fc45 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-08-24 08:08:10 UTC 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:    
Bug Blocks: 2510831    

Description Yadnyawalk Tale 2026-08-19 12:40:00 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades. If using the server-side component, an attacker may be able to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. A WebSocket upgrade request with a body could cause the parser to switch protocols before the complete request body was received, leaving trailing bytes to be handled as upgraded-protocol or pipelined data rather than normal HTTP body data. This issue is fixed in version 3.14.2.
Comment 1 Fedora Update System 2026-08-24 08:04:23 UTC 
FEDORA-2026-84f7af8f97 (python-aiohttp-3.14.3-3.fc46) has been submitted as an update to Fedora 46.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-84f7af8f97
Comment 2 Fedora Update System 2026-08-24 08:08:10 UTC 
FEDORA-2026-84f7af8f97 (python-aiohttp-3.14.3-3.fc46) has been pushed to the Fedora 46 stable repository.
If problem still persists, please make note of it in this bug report.
Comment 3 Fedora Update System 2026-08-24 08:25:26 UTC 
FEDORA-2026-e76e1f737b (python-aiohttp-3.14.3-3.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-e76e1f737b
Comment 4 Fedora Update System 2026-08-24 08:28:41 UTC 
FEDORA-2026-e76e1f737b (python-aiohttp-3.14.3-3.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.