aiohttp's ClientSession is vulnerable to CRLF injection via version
At a glance
Severity
HIGH 7.2
EPSS
EPSS 0.88 % · percentile 59 (2026-10-28)
State
PUBLISHED
Published
Updated
Assigner
GitHub_M
NVD status
Modified
Description
aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation made it possible for an attacker to modify the HTTP request (e.g. to insert a new header) or create a new HTTP request if the attacker controls the HTTP version. The vulnerability only occurs if the attacker can control the HTTP version of the request. This issue has been patched in version 3.9.0.
GHSA-q3qx-c6g2-7pw2 — aiohttp's ClientSession is vulnerable to CRLF injection via version
PYSEC-2023-250 — aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation made it possible for an attacker to modify the HTTP request
