Performance Impact in Django Framework's Text Processing Functions

CVE-2018-7537

Summary

A performance issue has been identified in the Django framework that affects the chars() and words() methods within the django.utils.text.Truncator when the html=True argument is used. This flaw can lead to significant slowdowns during evaluation of certain inputs, as it involves catastrophic backtracking in a regular expression. These methods are integral to the truncatechars_html and truncatewords_html template filters, thus rendering them vulnerable to performance degradation under specific conditions.

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