7.5

CVE-2026-25673

Potential denial-of-service vulnerability in URLField via Unicode normalization on Windows

An issue was discovered in 6.0 before 6.0.3, 5.2 before 5.2.12, and 4.2 before 4.2.29.
`URLField.to_python()` in Django calls `urllib.parse.urlsplit()`, which performs NFKC normalization on Windows that is disproportionately slow for certain Unicode characters, allowing a remote attacker to cause denial of service via large URL inputs containing these characters.
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Djangoproject ≫ Django Version >= 4.2.0 < 4.2.29
Djangoproject ≫ Django Version >= 5.2 < 5.2.12
Djangoproject ≫ Django Version >= 6.0 < 6.0.3
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.73% 0.498
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-400 Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

CWE-770 Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

https://docs.djangoproject.com/en/dev/releases/security/
Patch
Vendor Advisory
https://groups.google.com/g/django-announce
Release Notes
https://www.djangoproject.com/weblog/2026/mar/03/security-releases/
Patch
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-25673
https://bugzilla.redhat.com/show_bug.cgi?id=2444115
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25673.json