# CVE-2024-52303: python-aiohttp: aiohttp is an asynchronous HTTP client/server framework for asyncio and Python

CVE-2024-52303 is fixed in python-aiohttp on 1 platform, first by DEBIAN-CVE-2024-52303, released November 18, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-52303
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0059
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 18, 2024

## Description

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In versions starting with 3.10.6 and prior to 3.10.11, a memory leak can occur when a request produces a MatchInfoError. This was caused by adding an entry to a cache on each request, due to the building of each MatchInfoError producing a unique cache entry. An attacker may be able to exhaust the memory resources of a server by sending a substantial number (100,000s to millions) of such requests. Those who use any middlewares with aiohttp.web should upgrade to version 3.10.11 to receive a patch.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-aiohttp Debian 13.5 (trixie) | 3.10.11-1 | [DEBIAN-CVE-2024-52303](https://patchblox.com/security/data/fix/linux/debian-cve-2024-52303.md) | Nov 18, 2024 |
| Linux | python-aiohttp Debian 14 | 3.10.11-1 | [DEBIAN-CVE-2024-52303](https://patchblox.com/security/data/fix/linux/debian-cve-2024-52303.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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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