PYSEC-2026-1103 aiohttp allows request smuggling due to incorrect parsing of chunk extensions

Summary The Python parser parses newlines in chunk extensions incorrectly which can lead to request smuggling vulnerabilities under certain conditions. Impact If a pure Python version of aiohttp is installed i.e. without the usual C extensions or AIOHTTPNOEXTENSIONS is enabled, then an attacker m...

Netty vulnerable to request smuggling due to incorrect parsing of chunk extensions

Summary A flaw in netty's parsing of chunk extensions in HTTP/1.1 messages with chunked encoding can lead to request smuggling issues with some reverse proxies. Details When encountering a newline character LF while parsing a chunk extension, netty interprets the newline as the end of the...

aiohttp: aiohttp vulnerable to request smuggling due to incorrect parsing of chunk extensions

A flaw was found in the aiohttp package. The Python parser parses newlines in chunk extensions incorrectly, which can lead to request smuggling vulnerabilities under certain conditions. If a pure Python version of aiohttp is installed, for example, without the usual C extensions, or...

GHSA-8495-4G3G-X7PR aiohttp allows request smuggling due to incorrect parsing of chunk extensions

Summary The Python parser parses newlines in chunk extensions incorrectly which can lead to request smuggling vulnerabilities under certain conditions. Impact If a pure Python version of aiohttp is installed i.e. without the usual C extensions or AIOHTTPNOEXTENSIONS is enabled, then an attacker m...