CVE-2026-54277
AIOHTTP: C HTTP Parser Bypasses max_line_size for Fragmented Lines
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, it is possible to bypass the max_line_size check in parts of an HTTP request in the C parser. If using the optimised C parser (the default in pre-built wheels), then an attacker may be able to send oversized lines through the HTTP parser and use an excessive amount of memory, potentially leading to DoS. This vulnerability is fixed in 3.14.1.
INFO
Published Date :
June 22, 2026, 4:37 p.m.
Last Modified :
June 22, 2026, 4:37 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Solution
- Update aiohttp to version 3.14.1 or later.
- Ensure C parser is not exploited by oversized lines.
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