CVE-2025-50182

Published: June 19, 2025Last modified: June 25, 2025

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.

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References

• https://github.com/urllib3/urllib3/commit/7eb4a2aafe49a279c29b6d1f0ed0f42e9736194f
• https://github.com/urllib3/urllib3/releases/tag/2.5.0
• https://github.com/urllib3/urllib3/security/advisories/GHSA-48p4-8xcf-vxj5