Sourced from aiohttp's changelog.

3.14.3 (2026-07-22)

Bug fixes

• Fixed the client dropping only the first Authorization, Cookie and Proxy-Authorization header when a redirect crossed an origin -- by :user:arshsmith1.

  Related issues and pull requests on GitHub: :issue:13180.

• Fixed error message construction in the C HTTP parser -- by :user:bdraco.

  Related issues and pull requests on GitHub: :issue:13222.

---

3.14.2 (2026-07-20)

Bug fixes

• Fixed :py:attr:~aiohttp.web.StreamResponse.last_modified rounding a :class:datetime.datetime with a fractional second down.

  Related issues and pull requests on GitHub: :issue:5303.

• Fixed resolving localhost on Windows to fall back without AI_ADDRCONFIG when the first lookup fails, so localhost still works without an active network.

  Related issues and pull requests on GitHub: :issue:5357.

... (truncated)

• 5e392ce Release v3.14.3 (#13225)
• 49f65d5 [PR #13222/f4866933 backport][3.14] Build C parser error message from bounded...
• 240099e [PR #13180/ee53d655 backport][3.14] drop every copy of credential headers on ...
• d93f30a Bump version (#13202)
• c1b9212 Release v3.14.2 (#13201)
• 380d4b5 [PR #13054/ed8b040c backport][3.14] escape backslashes in digest auth quoted-...
• e1e1bee Make llhttp method array size dynamic (#13174) (#13196)
• aa4cf29 [PR #13170/2b906869 backport][3.14] Fix StreamResponse.last_modified rounding...
• 71b57b4 [PR #13172/a57747ed backport][3.14] Fix C parser folding fragment into query_...
• 64a03fb [PR #13169/1adc0cd7 backport][3.14] Upgrade http:// to https:// in README.rst...
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