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GeezerVison is showing github.com — gh-161675: Reject missing and duplicate Host headers in http.server by vishy0 · Pull Request #161696 · python/cpython

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@vishy0

@vishy0 vishy0 commented Nov 9, 2026

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Issue: gh-161675

Return 400 Bad Request for HTTP/1.1 requests missing a Host header and requests containing multiple Host fields, as required by RFC 9112 §3.2.

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@vishy0
pythongh-161675: Reject missing and duplicate Host headers in http.se…
24ed59c 
…rver
@python-cla-bot

python-cla-bot Bot commented Nov 9, 2026 •
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@bedevere-app bedevere-app Bot mentioned this pull request Nov 9, 2026
http.server: HTTP/1.1 requests without Host, with two Host fields or with an invalid Host value are accepted #161675
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@bedevere-app

bedevere-app Bot commented Nov 9, 2026

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Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool.

If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.
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@bedevere-app bedevere-app Bot added the awaiting review label Nov 9, 2026
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@vishy0
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