# CVE-2023-47627: python-aiohttp: aiohttp is an asynchronous HTTP client/server framework for asyncio and Python

CVE-2023-47627 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2023-47627, released November 14, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-47627
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0086
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 14, 2023

## Description

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. The HTTP parser in AIOHTTP has numerous problems with header parsing, which could lead to request smuggling. This parser is only used when AIOHTTP_NO_EXTENSIONS is enabled (or not using a prebuilt wheel). These bugs have been addressed in commit `d5c12ba89` which has been included in release version 3.8.6. Users are advised to upgrade. There are no known workarounds for these issues.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-aiohttp Debian 11.6 (bullseye) | 3.7.4-1+deb11u1 | [DLA-4041-1](https://patchblox.com/security/data/fix/linux/dla-4041-1.md) | Feb 3, 2025 |
| Linux | python-aiohttp Debian 12.15 (bookworm) | 3.8.4-1+deb12u1 | [DSA-5828-1](https://patchblox.com/security/data/fix/linux/dsa-5828-1.md) | Dec 11, 2024 |
| Linux | python-aiohttp Debian 13.5 (trixie) | 3.8.6-1 | [DEBIAN-CVE-2023-47627](https://patchblox.com/security/data/fix/linux/debian-cve-2023-47627.md) | Nov 14, 2023 |
| Linux | python-aiohttp Debian 14 | 3.8.6-1 | [DEBIAN-CVE-2023-47627](https://patchblox.com/security/data/fix/linux/debian-cve-2023-47627.md) | Nov 14, 2023 |
| 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 |

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Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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