REDHAT-BUG-2477167: Medium severity pypi/urllib3 vulnerability

Published May 13, 2026
·
Updated

urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connectionfromurl().urlopen(..., assertsamehost=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0.

Affected Software

1 affected component
pypi/urllib3>=1.23<2.7.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade urllib3 to a version that resolves this vulnerability.

    Fixed in 2.7.0

Event History

May 13, 2026
Data Sourced
via Red Hat·05:02 PM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2477167?

The severity of REDHAT-BUG-2477167 is medium with a risk score of 4.

2

How do I fix REDHAT-BUG-2477167?

You can fix REDHAT-BUG-2477167 by upgrading urllib3 to version 2.7.0 or later.

3

What is the impact of REDHAT-BUG-2477167?

REDHAT-BUG-2477167 allows sensitive headers to be forwarded during cross-origin redirects, which could lead to potential data leaks.

4

Which versions of urllib3 are affected by REDHAT-BUG-2477167?

REDHAT-BUG-2477167 affects urllib3 versions from 1.23 up to but not including 2.7.0.

5

Is there a workaround for REDHAT-BUG-2477167?

There are no specific workarounds recommended for REDHAT-BUG-2477167; upgrading to the fixed version is advised.

Contact

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