CVE-2026-54278
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductAiohttp
PublishedJun 22, 2026
First seenJun 22, 2026
Weakness typeCWE-409CWE-409
How to fix
Update
- aiohttp aiohttp3.14.1 or later
- aiohttp3.14.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| aiohttp aiohttp | v < 3.14.1 | 3.14.1 |
| aiohttpPyPI | v < 3.14.1 | 3.14.1 |
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