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32 lines
1.2 KiB
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32 lines
1.2 KiB
Plaintext
==========================
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Django 4.2.7 release notes
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==========================
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*November 1, 2023*
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Django 4.2.7 fixes a security issue with severity "moderate" and several bugs
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in 4.2.6.
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CVE-2023-46695: Potential denial of service vulnerability in ``UsernameField`` on Windows
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=========================================================================================
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The :func:`NFKC normalization <python:unicodedata.normalize>` is slow on
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Windows. As a consequence, ``django.contrib.auth.forms.UsernameField`` was
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subject to a potential denial of service attack via certain inputs with a very
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large number of Unicode characters.
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In order to avoid the vulnerability, invalid values longer than
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``UsernameField.max_length`` are no longer normalized, since they cannot pass
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validation anyway.
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Bugfixes
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========
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* Fixed a regression in Django 4.2 that caused a crash of
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``QuerySet.aggregate()`` with aggregates referencing expressions containing
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subqueries (:ticket:`34798`).
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* Restored, following a regression in Django 4.2, creating
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``varchar/text_pattern_ops`` indexes on ``CharField`` and ``TextField`` with
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deterministic collations on PostgreSQL (:ticket:`34932`).
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