=========================== Django 2.2.26 release notes =========================== *January 4, 2022* Django 2.2.26 fixes one security issue with severity "medium" and two security issues with severity "low" in 2.2.25. CVE-2021-45115: Denial-of-service possibility in ``UserAttributeSimilarityValidator`` ===================================================================================== :class:`.UserAttributeSimilarityValidator` incurred significant overhead evaluating submitted password that were artificially large in relative to the comparison values. On the assumption that access to user registration was unrestricted this provided a potential vector for a denial-of-service attack. In order to mitigate this issue, relatively long values are now ignored by ``UserAttributeSimilarityValidator``. This issue has severity "medium" according to the :ref:`Django security policy `. CVE-2021-45116: Potential information disclosure in ``dictsort`` template filter ================================================================================ Due to leveraging the Django Template Language's variable resolution logic, the :tfilter:`dictsort` template filter was potentially vulnerable to information disclosure or unintended method calls, if passed a suitably crafted key. In order to avoid this possibility, ``dictsort`` now works with a restricted resolution logic, that will not call methods, nor allow indexing on dictionaries. As a reminder, all untrusted user input should be validated before use. This issue has severity "low" according to the :ref:`Django security policy `. CVE-2021-45452: Potential directory-traversal via ``Storage.save()`` ==================================================================== ``Storage.save()`` allowed directory-traversal if directly passed suitably crafted file names. This issue has severity "low" according to the :ref:`Django security policy `.