# CVE-2026-54273: python-aiohttp: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python

CVE-2026-54273 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2026-54273, released June 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-54273
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0049
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 22, 2026

## Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, no limit was present on the number of pipelined requests that could be queued. An attacker may be able to use pipelined requests to use excessive amounts of memory, potentially leading to DoS. This vulnerability is fixed in 3.14.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-aiohttp Debian 14 | 3.14.1-1 | [DEBIAN-CVE-2026-54273](https://patchblox.com/security/data/fix/linux/debian-cve-2026-54273.md) | Jun 24, 2026 |
| Linux | python-aiohttp opensuse-leap 16.0 | 3.11.16-160000.6.1 | [OPENSUSE-SU-2026:21372-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21372-1.md) | Jul 18, 2026 |
| Linux | python-aiohttp sles 15.6 | 3.6.0-150100.3.38.1 | [SUSE-SU-2026:3208-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3208-1.md) | Jul 23, 2026 |
| Linux | python-aiohttp sles 15.7 | 3.6.0-150100.3.38.1 | [SUSE-SU-2026:3208-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3208-1.md) | Jul 23, 2026 |
| Linux | python-aiohttp sles 16.0 | 3.11.16-160000.6.1 | [SUSE-SU-2026:22819-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22819-1.md) | Jul 18, 2026 |
| Linux | python39-oci-sdk ol 9 | 0:2.187.0-1.0.5.el9 | [ELSA-2026-604898](https://patchblox.com/security/data/fix/linux/elsa-2026-604898.md) | Nov 7, 2026 |
| Linux | python39-oci-sdk-docs ol 9 | 0:2.187.0-1.0.5.el9 | [ELSA-2026-604898](https://patchblox.com/security/data/fix/linux/elsa-2026-604898.md) | Nov 7, 2026 |

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Data as of 2026-11-09T01:18:40Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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