# CVE-2025-69224: PYSEC-2026-1099 - AIOHTTP's unicode processing of header values could cause parsing discrepancies

Source: https://junglewise.ai/threats/cve-2025-69224-aiohttp-s-unicode-processing-of-header-values-could-cause-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-01-05  
License: CC BY 4.0 with a link back

CVE-2025-69224 · Severity: medium · CVSS 6.5 · Published 2026-01-05

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.

Technologies: [Aiohttp](https://junglewise.ai/threats/technologies/aiohttp-aiohttp), [aiohttp (PyPI)](https://junglewise.ai/threats/technologies/aiohttp). Vendors: [Aiohttp](https://junglewise.ai/threats/vendors/aiohttp), [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2025-69224 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-69224 being exploited in the wild.

**How severe is CVE-2025-69224?** Medium severity, with a CVSS score of 6.5, published 5 January 2026.

**Which products and versions are affected?** aiohttp (PyPI) ECOSYSTEM:introduced=0,fixed=3.13.3.

**Is there a fix for CVE-2025-69224?** Yes. aiohttp (PyPI): upgrade to 3.13.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2025-69224?** Check whether you run Aiohttp or aiohttp (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- aiohttp (PyPI): upgrade to 3.13.3 or later

  ```sh
  pip install "aiohttp>=3.13.3"
  ```


## Affected products

- Aiohttp
- aiohttp (PyPI) ECOSYSTEM:introduced=0,fixed=3.13.3

## Identifiers

- CVE-2025-69224
- GHSA-69f9-5gxw-wvc2
- PYSEC-2026-1099

## Related threats

- [aiohttp HTTP request smuggling in pure Python parser](https://junglewise.ai/threats/cve-2026-111750-aiohttp-is-an-asynchronous-http-client-server-framework-for)
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- [aiohttp Request scheme manipulation in absolute-form requests](https://junglewise.ai/threats/cve-2026-111748-aiohttp-is-an-asynchronous-http-client-server-framework-for)
- [AIOHTTP multipart request file descriptor exhaustion](https://junglewise.ai/threats/cve-2026-111066-aiohttp-is-an-asynchronous-http-client-server-framework-for)
- [aiohttp cookie Max-Age integer overflow causes connection pool exhaustion](https://junglewise.ai/threats/cve-2026-111065-aiohttp-is-an-asynchronous-http-client-server-framework-for)