Django 1.11.27 release notes

December 18, 2019

Django 1.11.27 fixes a security issue and a data loss bug in 1.11.26.

CVE-2019-19844: Potential account hijack via password reset form

By submitting a suitably crafted email address making use of Unicode characters, that compared equal to an existing user email when lower-cased for comparison, an attacker could be sent a password reset token for the matched account.

In order to avoid this vulnerability, password reset requests now compare the submitted email using the stricter, recommended algorithm for case-insensitive comparison of two identifiers from Unicode Technical Report 36, section 2.11.2(B)(2). Upon a match, the email containing the reset token will be sent to the email address on record rather than the submitted address.

Bugfixes

• Fixed a data loss possibility in SplitArrayField. When using with ArrayField(BooleanField()), all values after the first True value were marked as checked instead of preserving passed values (#31073).