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GeezerVison is showing github.com — [3.15] gh-155292: Don't consider Unicode codepoint attributes outside RFC 3454 (GH-155293) by miss-islington · Pull Request #156017 · python/cpython

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@miss-islington

@miss-islington miss-islington commented Aug 18, 2026 •
edited by bedevere-app Bot
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Due to a bug, some Unicode codepoint attributes were considered
for characters not yet defined in Unicode 3.2.0 or attributes
which changed in later Unicode versions. RFC 3454 (StringPrep)
requires using Unicode 3.2.0 strictly.

(cherry picked from commit 7e109d0)

Co-authored-by: Seth Larson [email protected]
Co-authored-by: Stan Ulbrych [email protected]
Co-authored-by: Petr Viktorin [email protected]

  • Issue: stringprep and IDNA 2003 incorrectly handles some characters #155292

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@sethmlarson @StanFromIreland
@encukou @miss-islington
pythongh-155292: Don't consider Unicode codepoint attributes outside …
f107388
…RFC 3454 (pythonGH-155293)

Due to a bug, some Unicode codepoint attributes were considered
for characters not yet defined in Unicode 3.2.0 or attributes
which changed in later Unicode versions. RFC 3454 (StringPrep)
requires using Unicode 3.2.0 strictly.

(cherry picked from commit 7e109d0)

Co-authored-by: Seth Larson <[email protected]>
Co-authored-by: Stan Ulbrych <[email protected]>
Co-authored-by: Petr Viktorin <[email protected]>
This was referenced Aug 18, 2026
stringprep and IDNA 2003 incorrectly handles some characters #155292
Closed
gh-155292: Don't consider Unicode codepoint attributes outside RFC 3454 #155293
Merged
@bedevere-app bedevere-app Bot added topic-unicode type-security A security issue awaiting review labels Aug 18, 2026
@pablogsal
pablogsal merged commit 5181304 into python:3.15 Aug 18, 2026
109 of 111 checks passed

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@bedevere-app bedevere-app Bot removed the awaiting review label Aug 18, 2026
@miss-islington
miss-islington deleted the backport-7e109d0-3.15 branch August 18, 2026 19:52
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3 participants

@miss-islington @pablogsal @sethmlarson
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