# CVE-2025-69228: PYSEC-2026-1100 - AIOHTTP vulnerable to denial of service through large payloads

Source: https://junglewise.ai/threats/cve-2025-69228-aiohttp-vulnerable-to-denial-of-service-through-large-payloads  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-01-06  
License: CC BY 4.0 with a link back

CVE-2025-69228 · Severity: high · CVSS 7.5 · Published 2026-01-06

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below allow a request to be crafted in such a way that an AIOHTTP server's memory fills up uncontrollably during processing. If an application includes a handler that uses the Request.post() method, an attacker may be able to freeze the server by exhausting the memory. 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-2025-69228 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-69228 being exploited in the wild.

**How severe is CVE-2025-69228?** High severity, with a CVSS score of 7.5, published 6 January 2026.

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

**Is there a fix for CVE-2025-69228?** 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-2025-69228?** 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-2025-69228
- GHSA-6jhg-hg63-jvvf
- PYSEC-2026-1100

## 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)
- [aiohttp host-only cookie scope bypass in subdomain handling](https://junglewise.ai/threats/cve-2026-111749-aiohttp-is-an-asynchronous-http-client-server-framework-for)
- [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)