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The parsed values of Accept-Language headers are cached in order to avoid repetitive parsing. This leads to a potential denial-of-service vector via excessive memory usage if the raw value of Accept-Language headers is very large. Accept-Language headers are now limited to a maximum length in order to avoid this issue.
25 lines
812 B
Plaintext
25 lines
812 B
Plaintext
==========================
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Django 4.1.6 release notes
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==========================
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*February 1, 2023*
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Django 4.1.6 fixes a security issue with severity "moderate" and a bug in
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4.1.5.
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CVE-2023-23969: Potential denial-of-service via ``Accept-Language`` headers
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===========================================================================
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The parsed values of ``Accept-Language`` headers are cached in order to avoid
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repetitive parsing. This leads to a potential denial-of-service vector via
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excessive memory usage if large header values are sent.
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In order to avoid this vulnerability, the ``Accept-Language`` header is now
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parsed up to a maximum length.
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Bugfixes
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========
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* Fixed a bug in Django 4.1 that caused a crash of model validation on
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``UniqueConstraint`` with ordered expressions (:ticket:`34291`).
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