CVE-2026-1285

HIGH

Django 4.2-4.2.27, 5.2-5.2.10, 6.0-6.0.1 - Denial of Service via Unmatched HTML End Tags

Title source: llm
STIX 2.1

Description

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.

References (3)

Core 3
Core References
Vendor Advisory, Patch vendor-advisory
https://docs.djangoproject.com/en/dev/releases/security/
Release Notes mailing-list
https://groups.google.com/g/django-announce

Scores

CVSS v3 7.5
EPSS 0.0099
EPSS Percentile 57.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-407
Status published
Products (4)
djangoproject/django 4.2 - 4.2.28
pypi/Django 4.2a1 - 4.2.28PyPI
pypi/Django 5.2a1 - 5.2.11PyPI
pypi/Django 6.0a1 - 6.0.2PyPI
Published Feb 03, 2026
Tracked Since Feb 18, 2026