An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28.
django.utils.text.Truncator.chars() and Truncator.words() methods (with html=True) and the truncatechars_html and truncatewords_html template filters allow a remote attacker to cause a potential denial-of-service via crafted inputs containing a large number of unmatched HTML end tags.
Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.
Django would like to thank Seokchan Yoon for reporting this issue.
Weakness
An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Django | Djangoproject | 4.2 (including) | 4.2.28 (excluding) |
| Django | Djangoproject | 5.2 (including) | 5.2.11 (excluding) |
| Django | Djangoproject | 6.0 (including) | 6.0.2 (excluding) |
| Red Hat Discovery 2 | RedHat | discovery/discovery-server-rhel9:sha256:cdf9b1062c961f67ee4f5dd3e23b26420517f884a51d2034efacff6847d47b5f | * |
| Python-django | Ubuntu | devel | * |
| Python-django | Ubuntu | esm-infra/bionic | * |
| Python-django | Ubuntu | esm-infra/focal | * |
| Python-django | Ubuntu | esm-infra/xenial | * |
| Python-django | Ubuntu | jammy | * |
| Python-django | Ubuntu | noble | * |
| Python-django | Ubuntu | questing | * |
| Python-django | Ubuntu | upstream | * |