urllib3

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urllib3

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Python's most depended-on HTTP client library

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Seth Larson

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News from urllib3

Updates on our activities and progress.

Released urllib3 2.6.3

📦 urllib3 2.6.3 is now available! It fixes a high-severity security issue related to decompression when following HTTP redirects (see advisory: GHSA-3...

Published on January 7, 2026 by Illia Volochii

Released urllib3 2.6.0

📦 urllib3 2.6.0 is now available! It fixes two high-severity security issues related to decompression of response content. Additionally, the new version:switched to the `backports.zstd` package for the zstd support on Python 3.13 and befor...

Published on December 5, 2025 by Illia Volochii

Released urllib3 2.5.0

📦 urllib3 2.5.0 is now available!It fixes two moderate security issues:pool managers now properly control redirects when `retries` is passed — CVE-2025-50181 (5.3 Medium) reported by Jacob Sandumredirects are now controlled by urllib3 in t...

Published on June 18, 2025 by Illia Volochii

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Seth Larson

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Lead maintainer of urllib3

Quentin Pradet

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Andrey Petrov

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Illia Volochii

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