CVE-2023-49082Improper Input Validation in Aiohttp

Severity
5.3MEDIUMNVD
OSV7.5
EPSS
0.2%
top 55.17%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedNov 29
Latest updateJul 17

Description

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation makes it possible for an attacker to modify the HTTP request (e.g. insert a new header) or even create a new HTTP request if the attacker controls the HTTP method. The vulnerability occurs only if the attacker can control the HTTP method (GET, POST etc.) of the request. If the attacker can control the HTTP version of the request it will be able to modify the request (request smuggling). This issue

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NExploitability: 3.9 | Impact: 1.4

Affected Packages3 packages

NVDaiohttp/aiohttp< 3.9.0
PyPIaiohttp/aiohttp< 3.9.0
CVEListV5aio-libs/aiohttp< 3.9.0

🔴Vulnerability Details

5
OSV
python-aiohttp vulnerabilities2025-07-17
OSV
CVE-2023-49082: aiohttp is an asynchronous HTTP client/server framework for asyncio and Python2023-11-29
CVEList
aiohttp's ClientSession is vulnerable to CRLF injection via method2023-11-29
GHSA
aiohttp's ClientSession is vulnerable to CRLF injection via method2023-11-27
OSV
aiohttp's ClientSession is vulnerable to CRLF injection via method2023-11-27

📋Vendor Advisories

3
Ubuntu
AIOHTTP vulnerabilities2025-07-17
Red Hat
aiohttp: CRLF injection if user controls the HTTP method using aiohttp client2023-11-29
Debian
CVE-2023-49082: python-aiohttp - aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. ...2023
CVE-2023-49082 — Improper Input Validation in Aiohttp | cvebase