CVE-2023-49082

Aliases:GHSA-qvrw-v9rv-5rjxPYSEC-2023-251
Advisory lineage Upstream: 0 Downstream: 9
Modified
Published: 29 Nov 2023, 20:07
Last modified:04 Nov 2025, 18:19

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
5.3 MEDIUM
v3.1 (cve.org)
EPSS Score
0.23% LOW
0% probability -0.01%
KEV
Not listed
Ransomware
No reports
Public exploits
2 found
Dark Web
Not detected

Timeline

29 Nov 2023, 20:07
Published
Vulnerability first disclosed
04 Nov 2025, 18:19
Last Modified
Vulnerability information updated

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 has been patched in version 3.9.0.

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:N/SC:N/SI:N/SA:N
  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Trends

Current EPSS score: 0.23%• Percentile: 46%

Techniques & Countermeasures

  • CWE-20•Improper Input Validation

    The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

  • CWE-93•Improper Neutralization of CRLF Sequences ('CRLF Injection')

    The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

Affected Systems

  • aio-libs•aiohttp

    < 3.9.0

  • aiohttp•aiohttp

    < 3.9.0

  • PyPI•aiohttp

    < e4ae01c2077d2cfa116aa82e4ff6866857f7c466 | < 3.9.0

References (11)