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.
References
| Link | Resource |
|---|---|
| https://docs.djangoproject.com/en/dev/releases/security/ | Vendor Advisory Patch |
| https://groups.google.com/g/django-announce | Release Notes |
| https://www.djangoproject.com/weblog/2026/mar/03/security-releases/ | Patch Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
05 Mar 2026, 14:12
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:* | |
| CWE | CWE-770 | |
| First Time |
Djangoproject django
Djangoproject |
|
| References | () https://docs.djangoproject.com/en/dev/releases/security/ - Vendor Advisory, Patch | |
| References | () https://groups.google.com/g/django-announce - Release Notes | |
| References | () https://www.djangoproject.com/weblog/2026/mar/03/security-releases/ - Patch, Vendor Advisory |
03 Mar 2026, 16:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
03 Mar 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-03-03 15:16
Updated : 2026-03-05 14:12
NVD link : CVE-2026-25673
Mitre link : CVE-2026-25673
CVE.ORG link : CVE-2026-25673
JSON object : View
Products Affected
djangoproject
- django