CVE-2023-43804
`Cookie` HTTP header isn't stripped on cross-origin redirects
- State
- Published
- Severity
- 5.9 Medium
- Published
- Oct 4, 2023
- Updated
- Nov 3, 2025
- Reserved
- Sep 22, 2023
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.9 Medium | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N | GitHub_M |
Weaknesses
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Affected Products
| Product | Versions |
|---|---|
urllib3urllib3 |
|
References
- https://github.com/urllib3/urllib3/security/advisories/GHSA-v845-jxx5-vc9f
- https://github.com/urllib3/urllib3/commit/01220354d389cd05474713f8c982d05c9b17aafb
- https://github.com/urllib3/urllib3/commit/644124ecd0b6e417c527191f866daa05a5a2056d
- https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I3PR7C6RJ6JUBQKIJ644DMIJSUP36VDY/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAGZXYJ7H2G3SB47M453VQVNAWKAEJJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5F5CUBAN5XMEBVBZPHFITBLMJV5FIJJ5/
- https://www.vicarius.io/vsociety/posts/cve-2023-43804-urllib3-vulnerability-3
- https://security.netapp.com/advisory/ntap-20241213-0007/
- https://lists.debian.org/debian-lts-announce/2024/12/msg00020.html
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