---
id: CVE-2026-111065
aliases:
  - GHSA-6cjc-53gc-5rqm
title: 'AIOHTTP: Connector pool exhaustion via Max-Age overflow'
summary: 'AIOHTTP: Connector pool exhaustion via Max-Age overflow'
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'
vendor: aiohttp
product: aiohttp
ecosystem: pip
affected:
  - aiohttp < 3.14.4
patched:
  - aiohttp 3.14.4
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T20:15:05.286053785Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-6cjc-53gc-5rqm'
references:
  - url: >-
      https://github.com/aio-libs/aiohttp/security/advisories/GHSA-6cjc-53gc-5rqm
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111065'
  - url: >-
      https://github.com/aio-libs/aiohttp/commit/9dd8eaf4e31f1237ef2c1574a8c82a739fca5805
  - url: 'https://github.com/aio-libs/aiohttp'
  - url: 'https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4'
  - url: 'https://github.com/advisories/GHSA-6cjc-53gc-5rqm'
tags:
  - osv
  - pip
  - ghsa
  - cve.org
epss: 0.00395
epssPercentile: 0.33582
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-19T17:34:44.525014Z'
cvssSource: cna
cwe:
  - CWE-770
ingestedAt: '2026-10-19T17:33:42.457Z'
---

## Overview

### Summary

An overflow in Max-Age processing can skip closing a connection.

### Impact

An attacker may be able to exhaust the connection pool temporarily, until garbage collection resolves the connections.

## Affected packages

- `aiohttp < 3.14.4`

## Remediation

Upgrade to a patched release:

- `aiohttp 3.14.4`