CVE-2024-23829

Aliases:GHSA-8qpw-xqxj-h4r2PYSEC-2024-26
Advisory lineage Upstream: 0 Downstream: 9
Modified
Published: 29 Jan 2024, 22:41
Last modified:03 Nov 2025, 20:36

Vulnerability Summary

Overall Risk (default)
medium
36/100
CVSS Score
6.5 MEDIUM
v3.1 (cve.org)
EPSS Score
0.49% LOW
0% probability +0.11%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

29 Jan 2024, 22:41
Published
Vulnerability first disclosed
03 Nov 2025, 20:36
Last Modified
Vulnerability information updated

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 require could, depending on deployment environment, assist in request smuggling. The unhandled exception could cause excessive resource consumption on the application server and/or its logging facilities. This vulnerability exists due to an incomplete fix for CVE-2023-47627. Version 3.9.2 fixes this vulnerability.

CVSS Metrics

  • v4.0•MEDIUM•Score: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS Trends

Current EPSS score: 0.49%• Percentile: 66%

Techniques & Countermeasures

  • CWE-444•Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

    The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

Affected Systems

  • aio-libs•aiohttp

    < 3.9.2

  • aiohttp•aiohttp

    < 3.9.2

  • fedoraproject•fedora

    39

  • PyPI•aiohttp

    < 33ccdfb0a12690af5bb49bda2319ec0907fa7827 | < 3.9.2

References (14)