# CVE-2023-49081: python-aiohttp: aiohttp is an asynchronous HTTP client/server framework for asyncio and Python

CVE-2023-49081 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2023-49081, released November 30, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-49081
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0088
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 29, 2023

## Description

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation made it possible for an attacker to modify the HTTP request (e.g. to insert a new header) or create a new HTTP request if the attacker controls the HTTP version. The vulnerability only occurs if the attacker can control the HTTP version of the request. This issue has been patched in version 3.9.0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-aiohttp Debian 12.15 (bookworm) | 3.8.4-1+deb12u1 | [DEBIAN-CVE-2023-49081](https://patchblox.com/security/data/fix/linux/debian-cve-2023-49081.md) | Nov 30, 2023 |
| Linux | python-aiohttp Debian 13.5 (trixie) | 3.9.1-1 | [DEBIAN-CVE-2023-49081](https://patchblox.com/security/data/fix/linux/debian-cve-2023-49081.md) | Nov 30, 2023 |
| Linux | python-aiohttp Debian 14 | 3.9.1-1 | [DEBIAN-CVE-2023-49081](https://patchblox.com/security/data/fix/linux/debian-cve-2023-49081.md) | Nov 30, 2023 |
| Linux | python3-aiohttp Ubuntu 18.04.6 LTS (bionic) | 3.0.1-1ubuntu0.1~esm5 | [python3-aiohttp 3.0.1-1ubuntu0.1~esm5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-aiohttp-3.0.1-1ubuntu0.1-esm5.md) | Nov 18, 2024 |
| Linux | python3-aiohttp Ubuntu 22.04.1 LTS (jammy) | 3.8.1-4ubuntu0.2+esm1 | [python3-aiohttp 3.8.1-4ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-aiohttp-3.8.1-4ubuntu0.2-esm1.md) | Nov 18, 2024 |

---

Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.