Vulnerability in Aio-Libs Aiohttp
CVE-2026-111749
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, Host-Only scope on an existing parent-domain cookie can be removed by a subdomain. A user who accesses an untrusted subdomain can consequently have host-only protections stripped from cookies, although impact is limited when applications do not reflect those cookies to a browser. This issue is fixed in version 3.14.4.
Published · last modified .
EPSS exploit prediction
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Affected products
- Aio-Libs Aiohttp — versions < 3.14.4