---
id: CVE-2026-54273
aliases:
  - GHSA-4fvr-rgm6-gqmc
  - PYSEC-2026-2107
title: 'aiohttp: HTTP/1 Pipelined Requests Queue Without Limit'
summary: 'aiohttp: HTTP/1 Pipelined Requests Queue Without Limit'
severity: medium
vendor: aiohttp
product: aiohttp
ecosystem: pip
affected:
  - aiohttp < 3.14.1
patched:
  - aiohttp 3.14.1
published: '2026-06-15'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:51:07.881817751Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-4fvr-rgm6-gqmc'
references:
  - url: >-
      https://github.com/aio-libs/aiohttp/security/advisories/GHSA-4fvr-rgm6-gqmc
  - url: >-
      https://github.com/aio-libs/aiohttp/commit/dfdfa9d5aad5d21f91c79fb2ceeba0f8046cb6cf
  - url: 'https://github.com/aio-libs/aiohttp'
  - url: 'https://github.com/advisories/GHSA-4fvr-rgm6-gqmc'
tags:
  - osv
  - pip
  - ghsa
epss: 0.00493
epssPercentile: 0.39785
cwe:
  - CWE-770
ingestedAt: '2026-07-07T15:41:58.686Z'
---

## Overview

### Summary

No limit was present on the number of pipelined requests that could be queued.

### Impact

An attacker may be able to use pipelined requests to use excessive amounts of memory, potentially leading to DoS.

-----

Patch: https://github.com/aio-libs/aiohttp/commit/dfdfa9d5aad5d21f91c79fb2ceeba0f8046cb6cf

## Affected packages

- `aiohttp < 3.14.1`

## Remediation

Upgrade to a patched release:

- `aiohttp 3.14.1`