CVE-2023-43804

Aliases:GHSA-v845-jxx5-vc9fPYSEC-2023-192
Advisory lineage Upstream: 0 Downstream: 33
Modified
Published: 04 Oct 2023, 16:01
Last modified:03 Nov 2025, 21:49

Vulnerability Summary

Overall Risk (default)
medium
33/100
CVSS Score
8.1 HIGH
v3.1 (nvd)
EPSS Score
0.95% LOW
1% probability +0.08%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Oct 2023, 16:01
Published
Vulnerability first disclosed
03 Nov 2025, 21:49
Last Modified
Vulnerability information updated

Description

urllib3 is a user-friendly HTTP client library for Python. urllib3 doesn't treat the `Cookie` HTTP header special or provide any helpers for managing cookies over HTTP, that is the responsibility of the user. However, it is possible for a user to specify a `Cookie` header and unknowingly leak information via HTTP redirects to a different origin if that user doesn't disable redirects explicitly. This issue has been patched in urllib3 version 1.26.17 or 2.0.5.

CVSS Metrics

  • v4.0•HIGH•Score: 7.4CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  • v3.1•MEDIUM•Score: 5.9CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
  • v3.1•HIGH•Score: 8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS Trends

Current EPSS score: 0.95%• Percentile: 77%

Techniques & Countermeasures

  • CWE-200•Exposure of Sensitive Information to an Unauthorized Actor

    The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Affected Systems

  • debian•debian_linux

    10.0

  • fedoraproject•fedora

    37 | 38 | 39

  • PyPI•urllib3

    < 01220354d389cd05474713f8c982d05c9b17aafb | ≥ 2.0.0, < 2.0.6 | < 1.26.17

  • python•urllib3

    < 1.26.17 | ≥ 2.0.0, < 2.0.6

  • urllib3•urllib3

    ≥ 2.0.0, < 2.0.6 | < 1.26.17

References (17)