---
id: CVE-2025-69224
title: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
summary: >-
  AIOHTTP is an asynchronous HTTP client/server framework for asyncio and
  Python. Versions 3.13.2 and below of the Python HTTP parser may allow a
  request smuggling attack with the presence of non-ASCII characters. If a pure
  Python version …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-444
vendor: aiohttp
product: aiohttp
affected:
  - aiohttp < 3.13.3
patched:
  - aiohttp 3.13.3
published: '2026-01-05'
updated: '2026-10-11'
sourceUpdated: '2026-10-11T20:10:00.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-69224'
references:
  - url: >-
      https://github.com/aio-libs/aiohttp/commit/32677f2adfd907420c078dda6b79225c6f4ebce0
    label: security-advisories@github.com
  - url: >-
      https://github.com/aio-libs/aiohttp/security/advisories/GHSA-69f9-5gxw-wvc2
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-69224'
  - url: 'https://github.com/aio-libs/aiohttp'
tags:
  - nvd
  - osv
  - pip
epss: 0.0025
epssPercentile: 0.16258
aliases:
  - GHSA-69f9-5gxw-wvc2
  - PYSEC-2026-1099
ecosystem: pip
ingestedAt: '2026-07-08T18:25:46.320Z'
---

## Overview

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below of the Python HTTP parser may allow a request smuggling attack with the presence of non-ASCII characters. If a pure Python version of AIOHTTP is installed (i.e. without the usual C extensions) or AIOHTTP_NO_EXTENSIONS is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. This issue is fixed in version 3.13.3.

## Affected

- `aiohttp < 3.13.3`

## Remediation

Upgrade past the affected range:

- `aiohttp 3.13.3`

## Package advisory (CVE-2025-69224)

Affected packages:

- `aiohttp < 3.13.3`

Patched in:

- `aiohttp 3.13.3`

Source: https://osv.dev/vulnerability/GHSA-69f9-5gxw-wvc2