Bug 2519528

Summary: CVE-2026-69244 python-aiohttp: AIOHTTP: Denial of Service via malformed HTTP responses [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Yadnyawalk Tale <ytale>
Component: python-aiohttpAssignee: Jonathan Wright <jonathan>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: epel10CC: igor.raits, jonathan, mail, python-packagers-sig, socketpair
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["ed8b5b94-d4bf-479d-b2ae-0a14016df3e1"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 2510825    

Description Yadnyawalk Tale 2026-08-19 12:38:19 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 3.14.3, an out-of-bounds heap read could occur in the C response parser while building an error message for a malformed response. An attacker controlled server, or possibly an accidental response, could trigger a DoS in the client. The vulnerable path was error message construction in aiohttp/_http_parser.pyx, where an llhttp error-position pointer was used to build a snippet for malformed chunked responses and malformed request or response bytes at the buffer end. This issue is fixed in version 3.14.3.
Comment 1 Коренберг Марк 2026-09-25 07:23:03 UTC 
fedora-updates:
python3-aiohttp-3.13.5-1.fc43.x86_64.rpm not fixed in 43
python3-aiohttp-3.13.5-1.fc44.x86_64.rpm not fixed in 44
python3-aiohttp-3.14.3-3.fc45.x86_64.rpm fixed in 45

PLEASE backport to 44 and 43. Probably deeper.