urllib3

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Python's most depended-on HTTP client library

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Seth Larson

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Credit from THANKS.DEV to urllib3 • June 15, 2026

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Contribution #959356

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Fixes issue #2577 (bounty)

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from dhoepp to urllib3 • June 12, 2026

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Today’s balance

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Total raised

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Estimated annual budget

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News from urllib3

Updates on our activities and progress.

Released urllib3 2.7.0

📦 urllib3 2.7.0 is now available! It addresses high-severity security issues related to:decompression bombs (GHSA-mf9v-mfxr-j63j)sensitive headers tra...

Published on May 7, 2026 by Illia Volochii

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

About

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Seth Larson

Admin

Lead maintainer of urllib3

Quentin Pradet

Admin

Andrey Petrov

Admin

Illia Volochii

Admin