Medium severity · published Oct 19, 2026
CVE-2026-111065
AIOHTTP: Connector pool exhaustion via Max-Age overflow
6.9
CVSS
0.4%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AI
aiohttp · aio-libs
< 3.14.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111065
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111065
github.com
https://github.com/aio-libs/aiohttp/commit/9dd8eaf4e31f1237ef2c1574a8c82a739fca5805
github.com
https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4
github.com
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-6cjc-53gc-5rqm
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