Redirect Control Issue in urllib3 Affects Python Libraries
CVE-2025-50182

5.3MEDIUM

Key Information:

Vendor

Urllib3

Status
Urllib3
Vendor
CVE Published:
19 June 2025

What is CVE-2025-50182?

The vulnerability in urllib3 prior to version 2.5.0 allows improper control of HTTP redirects when utilized in Pyodide runtime environments. This occurs because while urllib3 does provide parameters for managing redirects, these are bypassed in Pyodide, leading to potential security risks as the underlying runtime decides the redirect behavior. This flaw underscores the necessity for developers to upgrade to urllib3 version 2.5.0, where this issue has been resolved, ensuring that HTTP requests are managed more securely across various environments.

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Affected Version(s)

urllib3 >= 2.2.0, < 2.5.0

References

https://github.com/urllib3/urllib3/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/urllib3/urllib3/commit/7eb4a2aafe49a27...
x_refsource_MISC
https://github.com/urllib3/urllib3/releases/tag/2.5.0
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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