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Fedora Update Notification
FEDORA-2026-724d1b1044
2026-01-10 01:38:26.534895+00:00
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Name        : python-urllib3
Product     : Fedora 43
Version     : 2.6.3
Release     : 1.fc43
URL         : https://github.com/urllib3/urllib3
Summary     : HTTP library with thread-safe connection pooling, file post, and 
more
Description :
urllib3 is a powerful, user-friendly HTTP client for Python. urllib3 brings
many critical features that are missing from the Python standard libraries:

  • Thread safety.
  • Connection pooling.
  • Client-side SSL/TLS verification.
  • File uploads with multipart encoding.
  • Helpers for retrying requests and dealing with HTTP redirects.
  • Support for gzip, deflate, brotli, and zstd encoding.
  • Proxy support for HTTP and SOCKS.
  • 100% test coverage.

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Update Information:

2.6.3 (2026-01-07)
Fixed a high-severity security issue where decompression-bomb safeguards of
the streaming API were bypassed when HTTP redirects were followed.
GHSA-38jv-5279-wg99,
CVE-2026-21441
Started treating Retry-After times greater than 6 hours as 6 hours by default.
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ChangeLog:

* Wed Jan  7 2026 Benjamin A. Beasley <[email protected]> - 2.6.3-1
- Update to 2.6.3 (close RHBZ#2427603)
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References:

  [ 1 ] Bug #2427603 - python-urllib3-2.6.3 is available
        https://bugzilla.redhat.com/show_bug.cgi?id=2427603
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2026-724d1b1044' at the command
line. For more information, refer to the dnf documentation available at
http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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