CVE-2026-54278

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/aio-libs/aiohttp/commit/4f7480e474cccc6a8cc2c92ad3f17a31dedf8232	Patch
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g3cq-j2xw-wf74	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*

History

26 Jun 2026, 19:27

Type	Values Removed	Values Added
CPE		cpe:2.3:a:aiohttp:aiohttp::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References	~~() https://github.com/aio-libs/aiohttp/commit/4f7480e474cccc6a8cc2c92ad3f17a31dedf8232 -~~	() https://github.com/aio-libs/aiohttp/commit/4f7480e474cccc6a8cc2c92ad3f17a31dedf8232 - Patch
References	~~() https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g3cq-j2xw-wf74 -~~	() https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g3cq-j2xw-wf74 - Third Party Advisory
First Time		Aiohttp Aiohttp aiohttp

22 Jun 2026, 18:28

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-22 18:16

Updated : 2026-06-26 19:27

NVD link : CVE-2026-54278

Mitre link : CVE-2026-54278

CVE.ORG link : CVE-2026-54278

JSON object : View

Products Affected

aiohttp

aiohttp

CWE

CWE-409

Improper Handling of Highly Compressed Data (Data Amplification)

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