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CVE-2026-111749

AIOHTTP: Cookie from subdomain can remove Host-Only Scope from existing cookies PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
aio-libs / aiohttpaffected < 3.14.4

CWE

CWE-565

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.