The issue was situated in the wrap() method of the django.utils.text
module. This method and the wordwrap template filter were subject to
a potential DoS attack when used with very long strings.
For Debian 11 bullseye, this problem has been fixed in version
2:2.2.28-1~deb11u6.
We recommend that you upgrade your python-django packages.
For the detailed security status of python-django please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/python-django
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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