# CVE-2024-30251: PYSEC-2026-1098 - aiohttp vulnerable to Denial of Service when trying to parse malformed POST requests

Source: https://junglewise.ai/threats/cve-2024-30251-aiohttp-vulnerable-to-denial-of-service-when-trying-to-parse  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-07  
License: CC BY 4.0 with a link back

CVE-2024-30251 · Severity: low · CVSS 3.1 · Published 2026-07-07

aiohttp vulnerable to Denial of Service when trying to parse malformed POST requests

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

## Quick answers

**Is CVE-2024-30251 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2024-30251 being exploited in the wild.

**How severe is CVE-2024-30251?** Low severity, with a CVSS score of 3.1, published 7 July 2026.

**Which products and versions are affected?** aiohttp (PyPI) ECOSYSTEM:introduced=0,fixed=3.9.4.

**Is there a fix for CVE-2024-30251?** Yes. aiohttp (PyPI): upgrade to 3.9.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2024-30251?** Check whether you run 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 3.9.4 or later

  ```sh
  pip install "aiohttp>=3.9.4"
  ```


## Affected products

- aiohttp (PyPI) ECOSYSTEM:introduced=0,fixed=3.9.4

## Identifiers

- CVE-2024-30251
- GHSA-5m98-qgg9-wh84
- PYSEC-2026-1098

## 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)