CVE-2025-50182

low-risk

Published 2025-06-19

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.

Do I need to act?

0.02% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 5.3/10 Medium

NETWORK / HIGH complexity

Affected Products (1)

Urllib3

Affected Vendors

Python

References (3)

Patch https://github.com/urllib3/urllib3/commit/7eb4a2aafe49a279c29b6d1f0ed0f42e973619...

https://github.com/urllib3/urllib3/releases/tag/2.5.0

Vendor Advisory https://github.com/urllib3/urllib3/security/advisories/GHSA-48p4-8xcf-vxj5

/ 100

low-risk

Severity 17/34 · Moderate

Exploitability 0/34 · Minimal

Exposure 5/34 · Minimal