CVE-2024-23829HTTP Request Smuggling in Aiohttp

Severity
6.5MEDIUMNVD
CNA5.3OSV7.5
EPSS
0.5%
top 33.34%
CISA KEV
Not in KEV
Exploit
No known exploits
Timeline
PublishedJan 29
Latest updateJul 17

Description

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Security-sensitive parts of the Python HTTP parser retained minor differences in allowable character sets, that must trigger error handling to robustly match frame boundaries of proxies in order to protect against injection of additional requests. Additionally, validation could trigger exceptions that were not handled consistently with processing of other malformed input. Being more lenient than internet standards re

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:LExploitability: 3.9 | Impact: 2.5

Affected Packages3 packages

NVDaiohttp/aiohttp< 3.9.2
PyPIaiohttp/aiohttp< 3.9.2
CVEListV5aio-libs/aiohttp< 3.9.2

Also affects: Fedora 39

Patches

🔴Vulnerability Details

5
OSV
python-aiohttp vulnerabilities2025-07-17
GHSA
aiohttp's HTTP parser (the python one, not llhttp) still overly lenient about separators2024-01-29
CVEList
aiohttp's HTTP parser (the python one, not llhttp) still overly lenient about separators2024-01-29
OSV
CVE-2024-23829: aiohttp is an asynchronous HTTP client/server framework for asyncio and Python2024-01-29
OSV
aiohttp's HTTP parser (the python one, not llhttp) still overly lenient about separators2024-01-29

📋Vendor Advisories

4
Ubuntu
AIOHTTP vulnerabilities2025-07-17
Red Hat
python-aiohttp: http request smuggling2024-01-30
Microsoft
aiohttp's HTTP parser (the python one, not llhttp) still overly lenient about separators2024-01-09
Debian
CVE-2024-23829: python-aiohttp - aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. ...2024
CVE-2024-23829 — HTTP Request Smuggling in Aiohttp | cvebase