urllib3 is a user-friendly HTTP client library for Python. Starting in version 2.2.0 and prior to 2.5.0, urllib3 does not control redirects in browsers and Node.js. urllib3 supports being used in a Pyodide runtime utilizing the JavaScript Fetch API or falling back on XMLHttpRequest. This means Python libraries can be used to make HTTP requests from a browser or Node.js. Additionally, urllib3 provides a mechanism to control redirects, but the retries and redirect parameters are ignored with Pyodide; the runtime itself determines redirect behavior. This issue has been patched in version 2.5.0.

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-18677 urllib3 does not control redirects in browsers and Node.js
Github GHSA Github GHSA GHSA-48p4-8xcf-vxj5 urllib3 does not control redirects in browsers and Node.js
Ubuntu USN Ubuntu USN USN-7599-1 urllib3 vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 22 Dec 2025 18:45:00 +0000

Type Values Removed Values Added
References

Mon, 22 Dec 2025 17:30:00 +0000

Type Values Removed Values Added
First Time appeared Python
Python urllib3
CPEs cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:*
Vendors & Products Python
Python urllib3

Mon, 30 Jun 2025 19:15:00 +0000

Type Values Removed Values Added
Description urllib3 is a user-friendly HTTP client library for Python. Prior to 2.5.0, urllib3 does not control redirects in browsers and Node.js. urllib3 supports being used in a Pyodide runtime utilizing the JavaScript Fetch API or falling back on XMLHttpRequest. This means Python libraries can be used to make HTTP requests from a browser or Node.js. Additionally, urllib3 provides a mechanism to control redirects, but the retries and redirect parameters are ignored with Pyodide; the runtime itself determines redirect behavior. This issue has been patched in version 2.5.0. urllib3 is a user-friendly HTTP client library for Python. Starting in version 2.2.0 and prior to 2.5.0, urllib3 does not control redirects in browsers and Node.js. urllib3 supports being used in a Pyodide runtime utilizing the JavaScript Fetch API or falling back on XMLHttpRequest. This means Python libraries can be used to make HTTP requests from a browser or Node.js. Additionally, urllib3 provides a mechanism to control redirects, but the retries and redirect parameters are ignored with Pyodide; the runtime itself determines redirect behavior. This issue has been patched in version 2.5.0.

Mon, 23 Jun 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 20 Jun 2025 03:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 19 Jun 2025 02:00:00 +0000

Type Values Removed Values Added
Description urllib3 is a user-friendly HTTP client library for Python. Prior to 2.5.0, urllib3 does not control redirects in browsers and Node.js. urllib3 supports being used in a Pyodide runtime utilizing the JavaScript Fetch API or falling back on XMLHttpRequest. This means Python libraries can be used to make HTTP requests from a browser or Node.js. Additionally, urllib3 provides a mechanism to control redirects, but the retries and redirect parameters are ignored with Pyodide; the runtime itself determines redirect behavior. This issue has been patched in version 2.5.0.
Title urllib3 does not control redirects in browsers and Node.js
Weaknesses CWE-601
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-12-22T18:43:46.779Z

Reserved: 2025-06-13T19:17:51.726Z

Link: CVE-2025-50182

cve-icon Vulnrichment

Updated: 2025-06-23T16:56:08.872Z

cve-icon NVD

Status : Modified

Published: 2025-06-19T02:15:17.967

Modified: 2025-12-22T19:15:49.177

Link: CVE-2025-50182

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-06-19T01:42:44Z

Links: CVE-2025-50182 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-06-20T13:24:21Z

Weaknesses