AIOHTTP: C HTTP Parser Bypasses max_line_size for Fragmented Lines
At a glance
Severity
MEDIUM 6.6
EPSS
EPSS 0.56 % · percentile 47 (2026-10-28)
State
PUBLISHED
Published
Updated
Assigner
GitHub_M
NVD status
Analyzed
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.
GHSA-63hw-fmq6-xxg2 — aiohttp: C HTTP Parser Bypasses max_line_size for Fragmented Lines
PYSEC-2026-2110 — 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
