---
id: CVE-2025-69225
aliases:
  - GHSA-mqqc-3gqh-h2x8
  - PYSEC-2026-1109
title: AIOHTTP has unicode match groups in regexes for ASCII protocol elements
summary: AIOHTTP has unicode match groups in regexes for ASCII protocol elements
severity: low
vendor: aiohttp
product: aiohttp
ecosystem: pip
affected:
  - aiohttp < 3.13.3
patched:
  - aiohttp 3.13.3
published: '2026-01-05'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:33.538693726Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-mqqc-3gqh-h2x8'
references:
  - url: >-
      https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mqqc-3gqh-h2x8
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-69225'
  - url: >-
      https://github.com/aio-libs/aiohttp/commit/c7b7a044f88c71cefda95ec75cdcfaa4792b3b96
  - url: 'https://github.com/aio-libs/aiohttp'
tags:
  - osv
  - pip
epss: 0.00276
epssPercentile: 0.17787
ingestedAt: '2026-07-08T18:25:51.425Z'
---

## Overview

### Summary

The parser allows non-ASCII decimals to be present in the Range header.

### Impact

There is no known impact, but there is the possibility that there's a method to exploit a request smuggling vulnerability.

----

Patch: https://github.com/aio-libs/aiohttp/commit/c7b7a044f88c71cefda95ec75cdcfaa4792b3b96

## Affected packages

- `aiohttp < 3.13.3`

## Remediation

Upgrade to a patched release:

- `aiohttp 3.13.3`