Sourced from urllib3's releases.

2.5.0

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Security issues

urllib3 2.5.0 fixes two moderate security issues:

• Pool managers now properly control redirects when retries is passed — CVE-2025-50181 reported by @​sandumjacob (5.3 Medium, GHSA-pq67-6m6q-mj2v)
• Redirects are now controlled by urllib3 in the Node.js runtime — CVE-2025-50182 (5.3 Medium, GHSA-48p4-8xcf-vxj5)

Features

• Added support for the compression.zstd module that is new in Python 3.14. See PEP 784 for more information. (#3610)
• Added support for version 0.5 of hatch-vcs (#3612)

Bugfixes

• Raised exception for HTTPResponse.shutdown on a connection already released to the pool. (#3581)
• Fixed incorrect CONNECT statement when using an IPv6 proxy with connection_from_host. Previously would not be wrapped in []. (#3615)

Sourced from urllib3's changelog.

2.5.0 (2025-06-18)

Features

• Added support for the compression.zstd module that is new in Python 3.14. See PEP 784 <https://peps.python.org/pep-0784/>_ for more information. ([#3610](https://github.com/urllib3/urllib3/issues/3610) <https://github.com/urllib3/urllib3/issues/3610>__)
• Added support for version 0.5 of hatch-vcs ([#3612](https://github.com/urllib3/urllib3/issues/3612) <https://github.com/urllib3/urllib3/issues/3612>__)

Bugfixes

• Fixed a security issue where restricting the maximum number of followed redirects at the urllib3.PoolManager level via the retries parameter did not work.
• Made the Node.js runtime respect redirect parameters such as retries and redirects.
• Raised exception for HTTPResponse.shutdown on a connection already released to the pool. ([#3581](https://github.com/urllib3/urllib3/issues/3581) <https://github.com/urllib3/urllib3/issues/3581>__)
• Fixed incorrect CONNECT statement when using an IPv6 proxy with connection_from_host. Previously would not be wrapped in []. ([#3615](https://github.com/urllib3/urllib3/issues/3615) <https://github.com/urllib3/urllib3/issues/3615>__)

• aaab4ec Release 2.5.0
• 7eb4a2a Merge commit from fork
• f05b132 Merge commit from fork
• d03fe32 Fix HTTP tunneling with IPv6 in older Python versions
• 11661e9 Bump github/codeql-action from 3.28.0 to 3.29.0 (#3624)
• 6a0ecc6 Update v2 migration guide to 2.4.0 (#3621)
• 8e32e60 Raise exception for shutdown on a connection already released to the pool (#3...
• 9996e0f Fix emscripten CI for Chrome 137+ (#3599)
• 4fd1a99 Bump RECENT_DATE (#3617)
• c4b5917 Add support for the new compression.zstd module in Python 3.14 (#3611)
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