CVE-2026-54278 | AIOHTTP is an asynchronous HTTP client/server framework for … | CVSS 6.6 MEDIUM

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.

Metadata

CVE ID: CVE-2026-54278
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-12 17:13 UTC
Published: 2026-06-22 16:38 UTC
Last updated: 2026-06-22 16:38 UTC
Primary CWE: CWE-409
CWE-409: Improper Handling of Highly Compressed Data (Data A…
Vendor / Product: aio-libs / aiohttp
Sources: cve.org · NVD

Severity & Metrics

6.6 MEDIUM CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

Affected products (1)

Vendor	Product	Platform	Versions
aio-libs	aiohttp	—	< 3.14.1

Weakness (CWE)

CWE	Source	Description
CWE-409	cna	CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.6	MEDIUM	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

References (2)

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g3cq-j2xw-wf74 https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g3cq-j2xw-wf74
https://github.com/aio-libs/aiohttp/commit/4f7480e474cccc6a8cc2c92ad3f17a31dedf8232 https://github.com/aio-libs/aiohttp/commit/4f7480e474cccc6a8cc2c92ad3f17a31dedf8232