CVE-2023-43804

5.9 MEDIUM
Published: October 04, 2023 Modified: November 03, 2025
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/urllib3/urllib3/commit/01220354d389cd05474713f8c982d05c9b17aafb
Source: security-advisories@github.com
Patch
https://github.com/urllib3/urllib3/commit/644124ecd0b6e417c527191f866daa05a5a2056d
Source: security-advisories@github.com
Patch
https://github.com/urllib3/urllib3/security/advisories/GHSA-v845-jxx5-vc9f
Source: security-advisories@github.com
Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html
Source: security-advisories@github.com
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5F5CUBAN5XMEBVBZPHFITBLMJV5FIJJ5/
Source: security-advisories@github.com
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I3PR7C6RJ6JUBQKIJ644DMIJSUP36VDY/
Source: security-advisories@github.com
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAGZXYJ7H2G3SB47M453VQVNAWKAEJJ/
Source: security-advisories@github.com
Mailing List Third Party Advisory
https://github.com/urllib3/urllib3/commit/01220354d389cd05474713f8c982d05c9b17aafb
Source: af854a3a-2127-422b-91ae-364da2661108
Patch
https://github.com/urllib3/urllib3/commit/644124ecd0b6e417c527191f866daa05a5a2056d
Source: af854a3a-2127-422b-91ae-364da2661108
Patch
https://github.com/urllib3/urllib3/security/advisories/GHSA-v845-jxx5-vc9f
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/12/msg00020.html
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5F5CUBAN5XMEBVBZPHFITBLMJV5FIJJ5/
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I3PR7C6RJ6JUBQKIJ644DMIJSUP36VDY/
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAGZXYJ7H2G3SB47M453VQVNAWKAEJJ/
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20241213-0007/
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.vicarius.io/vsociety/posts/cve-2023-43804-urllib3-vulnerability-3
Source: af854a3a-2127-422b-91ae-364da2661108

17 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.9 / 10.0
EPSS (Exploit Probability)
0.9%
75th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-200

Affected Vendors

debian python fedoraproject

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