UNKNOWN PyPI
aiohttp: C HTTP Parser Bypasses max_line_size for Fragmented Lines
GHSA-63hw-fmq6-xxg2 · CVE-2026-54277 · PYSEC-2026-2110
Published · Modified
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Description
Summary
It is possible to bypass the max_line_size check in parts of an HTTP request in the C parser.
Impact
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.
Patch: https://github.com/aio-libs/aiohttp/commit/5ab61bb4cd88f19b712f12c7c9295fe262bf804d
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