An issue was discovered in Django 1.11.x before 1.11.23, 2.1.x before 2.1.11, and 2.2.x before 2.2.4. If django.utils.text.Truncator's chars() and words() methods were passed the html=True argument, they were extremely slow to evaluate certain inputs due to a catastrophic backtracking vulnerability in a regular expression. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which were thus vulnerable.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade py-djangoUpgrade py3-django | Nov 8, 2019 | Aug 2, 2019 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Aug 2, 2019 |
| Debian | — | Upgrade python-django | Aug 8, 2019 | Aug 2, 2019 |
| Freebsd | — | Upgrade py37-django22Upgrade py36-django111Upgrade py37-django111Upgrade py36-django22Upgrade py36-django21Upgrade py35-django22Upgrade py27-django22Upgrade py35-django111Upgrade py27-django21Upgrade py35-django21Upgrade py27-django111Upgrade py37-django21 | Aug 4, 2019 | Aug 3, 2019 |
| Gentoo Linux | — | Upgrade dev-python/django. | May 1, 2020 | Aug 2, 2019 |
| Oracle Solaris | — | Upgrade library/python/django-34 to version 1.11.23-11.4.14.0.1.3.0 on Solaris 11.4Upgrade library/python/django to version 1.11.23-11.4.14.0.1.3.0 on Solaris 11.4Upgrade library/python/django-27 to version 1.11.23-11.4.14.0.1.3.0 on Solaris 11.4Upgrade library/python/django-35 to version 1.11.23-11.4.14.0.1.3.0 on Solaris 11.4Upgrade library/python/django-37 to version 1.11.23-11.4.14.0.1.3.0 on Solaris 11.4 | Oct 16, 2019 | Aug 2, 2019 |
| Suse | — | Upgrade python3-django | Aug 9, 2019 | Aug 1, 2019 |
| Ubuntu | — | Upgrade python3-djangoUpgrade python-django | Aug 2, 2019 | Aug 1, 2019 |
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