CVE-2023-49081

Aliases:GHSA-q3qx-c6g2-7pw2PYSEC-2023-250
Advisory lineage Upstream: 0 Downstream: 12
Modified
Published: 30 Nov 2023, 06:56
Last modified:04 Nov 2025, 18:19

Vulnerability Summary

Overall Risk (default)
medium
39/100
CVSS Score
7.2 HIGH
v3.1 (cve.org)
EPSS Score
0.47% LOW
0% probability -0.03%
KEV
Not listed
Ransomware
No reports
Public exploits
2 found
Dark Web
Not detected

Timeline

30 Nov 2023, 06:56
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 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.

CVSS Metrics

  • v4.0•MEDIUM•Score: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
  • v3.1•HIGH•Score: 7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A: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: 0.47%• Percentile: 65%

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.

Affected Systems

  • aio-libs•aiohttp

    < 3.9.0

  • aiohttp•aiohttp

    < 3.9.0

  • PyPI•aiohttp

    < 1e86b777e61cf4eefc7d92fa57fa19dcc676013b | < 3.9.0

References (11)