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CVE-2026-54278
AIOHTTP: Unread Compressed Request Bodies Bypass client_max_size During Cleanup
Overview
Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, during cleanup it is possible for a compressed request body to be decompressed into memory in one chunk. An attacker may be able to send a compressed payload in specific situations that could be decompressed into memory, potentially leading to DoS (a zip bomb edge case). This vulnerability is fixed in 3.14.1.

Details
INFO

Published Date :

June 22, 2026, 4:38 p.m.

Last Modified :

June 22, 2026, 4:38 p.m.

Remotely Exploit :

No

Source :

GitHub_M
Impact
Affected Products

The following products are affected by CVE-2026-54278 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Aiohttp aiohttp
: Total Affected Vendor : 1 | Products : 1
Solution
Update aiohttp to version 3.14.1 or later to fix a denial-of-service vulnerability.
  • Update aiohttp to version 3.14.1 or later.
  • Apply vendor-provided patches if available.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-54278 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
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