---
id: CVE-2026-54274
aliases:
  - GHSA-xcgm-r5h9-7989
  - PYSEC-2026-2108
title: 'aiohttp: Incomplete websocket frame payloads bypass memory limits'
summary: 'aiohttp: Incomplete websocket frame payloads bypass memory limits'
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: '2026-09-10T03:50:12.346397944Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-xcgm-r5h9-7989'
references:
  - url: >-
      https://github.com/aio-libs/aiohttp/security/advisories/GHSA-xcgm-r5h9-7989
  - url: 'https://github.com/aio-libs/aiohttp'
  - url: 'https://github.com/advisories/GHSA-xcgm-r5h9-7989'
tags:
  - osv
  - pip
  - ghsa
epss: 0.00539
epssPercentile: 0.42896
cwe:
  - CWE-770
ingestedAt: '2026-07-07T15:41:58.679Z'
---

## Overview

### Summary

If an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use.

### Impact

If a web application has WebSocket endpoints, it may be possible for an attacker to execute a DoS attack through excessive memory use.

-----

Patch: https://github.com/aio-libs/aiohttp/commit/14b6ee851fb16ec199acb950de0c82d476799e7d

## Affected packages

- `aiohttp < 3.14.1`

## Remediation

Upgrade to a patched release:

- `aiohttp 3.14.1`