CVE-2026-111749: CWE-565: Reliance on Cookies without Validation and Integrity Checking in aio-libs aiohttp
Description
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.
CVSS v4.0
Score 2.3low
Affected software
aio-libs
aiohttp
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-16T17:52:09.081Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad651102cdf04f65676be65
Added to database: 10/19/2026, 17:19:12 UTC
Last updated: 10/19/2026, 17:19:12 UTC
Views: 1
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