Potential denial-of-service vulnerability in django.utils.text.Truncator HTML methods_CVE-2026-1285

7.5 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Basic Information

ID CVE-2026-1285

Source DSF

Published Feb 3, 2026 at 14:35

Modified Feb 3, 2026 at 16:22

Affected Product

Vendor djangoproject

Product Django

Version 6.0

Affected Versions djangoproject Django 6.0
djangoproject Django 5.2
djangoproject Django 4.2

CWE Classification

CWE-407

References

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    "published": "2026-02-03T14:35:50.254Z",
    "modified": "2026-02-03T16:22:33.352Z",
    "type": "cve",
    "title": "Potential denial-of-service vulnerability in django.utils.text.Truncator HTML methods",
    "source": "DSF",
    "references": "https://docs.djangoproject.com/en/dev/releases/security/\nhttps://groups.google.com/g/django-announce\nhttps://www.djangoproject.com/weblog/2026/feb/03/security-releases/",
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