---
id: CVE-2026-111065
title: 'AIOHTTP: Connector pool exhaustion via Max-Age overflow'
summary: >-
  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 ga…
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-770
vendor: aio-libs
product: aiohttp
affected:
  - aiohttp < 3.14.4
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-19T17:34:44.525014Z'
published: '2026-10-19'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T17:35:52.967Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111065'
references:
  - url: >-
      https://github.com/aio-libs/aiohttp/security/advisories/GHSA-6cjc-53gc-5rqm
    label: >-
      https://github.com/aio-libs/aiohttp/security/advisories/GHSA-6cjc-53gc-5rqm
  - url: >-
      https://github.com/aio-libs/aiohttp/commit/9dd8eaf4e31f1237ef2c1574a8c82a739fca5805
    label: >-
      https://github.com/aio-libs/aiohttp/commit/9dd8eaf4e31f1237ef2c1574a8c82a739fca5805
  - url: 'https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4'
    label: 'https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4'
tags:
  - cve.org
ingestedAt: '2026-10-19T17:33:42.457Z'
---

## Overview

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.

## Affected

- `aiohttp < 3.14.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.