CVE-2026-54278

HIGH7.5

AIOHTTP: Unread Compressed Request Bodies Bypass client_max_size During Cleanup

Published Jun 22, 2026

Modified 1 months ago

Details

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.

References

WEB

https://github.com/aio-libs/aiohttp/commit/4f7480e474cccc6a8cc2c92ad3f17a31dedf8232

WEB

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

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-54278

CVSS Analysis

CVSS v4.0

6.6

Exploitability

Attack Vector