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[ CVE-2026-111065 · Published 19 Oct 2026 ]

AIOHTTP: Connector pool exhaustion via Max-Age overflow

CVSS 6.9 EPSS <1%Fix available

[ Description ]Official description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, Max-Age processing can overflow and skip closing a connection. An attacker can consequently exhaust the connection pool temporarily until garbage collection resolves the connections. This issue is fixed in version 3.14.4.

[ Fixes ]Fixes and patches

  • aiohttp 3.14.4Fixed version · GitHub Advisories · pip package aiohttp: upgrade to 3.14.4 or later (affected <= 3.14.3)

[ Packages ]Affected open-source packages

[ References ]References