CVE-2026-25673
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Django
- Vendor
- djangoproject
- Product
- Django
- Platforms
- Unknown
- Default status
unaffected- Package
- django
- Package collection
- https://pypi.org/project/Django/
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.0 | affected | semver | 6.0.3 | Unavailable | None listed |
| 6.0.3 | unaffected | semver | Unavailable | Unavailable | None listed |
| 5.2 | affected | semver | 5.2.12 | Unavailable | None listed |
| 5.2.12 | unaffected | semver | Unavailable | Unavailable | None listed |
| 4.2 | affected | semver | 4.2.29 | Unavailable | None listed |
| 4.2.29 | unaffected | semver | Unavailable | Unavailable | None listed |