CVE-2023-47627

Aliases:GHSA-gfw2-4jvh-wgfgPYSEC-2023-246
Advisory lineage Upstream: 0 Downstream: 12
Modified
Published: 14 Nov 2023, 20:48
Last modified:03 Nov 2025, 20:36

Vulnerability Summary

Overall Risk (default)
medium
40/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
0.21% LOW
0% probability -0.04%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

14 Nov 2023, 20:48
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. The HTTP parser in AIOHTTP has numerous problems with header parsing, which could lead to request smuggling. This parser is only used when AIOHTTP_NO_EXTENSIONS is enabled (or not using a prebuilt wheel). These bugs have been addressed in commit `d5c12ba89` which has been included in release version 3.8.6. Users are advised to upgrade. There are no known workarounds for these issues.

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
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Trends

Current EPSS score: 0.21%• Percentile: 44%

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

    < 3.8.6

  • aiohttp•aiohttp

    < 3.8.6

  • PyPI•aiohttp

    < d5c12ba890557a575c313bb3017910d7616fce3d | < 3.8.6

References (13)