GHSA-4rrr-2h4v-f3j9
Django has Inefficient Algorithmic Complexity
At a glance
- Published
- Updated
- CVE
- CVE-2026-1285
- Aliases
- BIT-django-2026-1285, PYSEC-2026-45
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
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.
Affected packages
| Package | Versions |
|---|---|
| PyPI · django | introduced 6.0a1, fixed 6.0.2 |
| PyPI · django | introduced 5.2a1, fixed 5.2.11 |
| PyPI · django | introduced 4.2a1, fixed 4.2.28 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-1285 ADVISORY
- https://github.com/django/django/commit/a33540b3e20b5d759aa8b2e4b9ca0e8edd285344 WEB
- https://docs.djangoproject.com/en/dev/releases/security WEB
- https://github.com/django/django PACKAGE
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-45.yaml WEB
- https://groups.google.com/g/django-announce WEB
- https://www.djangoproject.com/weblog/2026/feb/03/security-releases WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |