CVE-2026-111749Low· 2.3▾ SunlitAIOHTTP 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 consequent…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 12.6 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.3%
Last analysed / modified upstream
0.3% → 0.4%
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.
aiohttp < 3.14.4Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
aiohttp < 3.14.4Patched in:
aiohttp 3.14.4Connected by shared product, vendor, weakness, or advisory.
CVE-2026-111065Medium· 6.9AIOHTTP: Connector pool exhaustion via Max-Age overflow
CVE-2026-111748Medium· 6.3AIOHTTP: Absolute-form request targets can spoof Request.scheme
CVE-2026-111750Medium· 6.3AIOHTTP: Pure-Python parser request smuggling
CVE-2026-111063Medium· 6.3AIOHTTP: Secure attribute not enforced for shared cookie
CVE-2026-111064High· 8.2aiohttp server lacks an initial request/header timeout
GHSA-2g87-pp6c-29x5Highaiohttp: Multiple instances of excessive or unbounded memory/CPU use