Not rated
CVE-2026-25673 An issue was discovered in 6.0 before 6.0.3, 5.2 before 5.2.12, and 4.2 before 4.2.29
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Ansible Automation Platform 2 | Versions not published | |
| Red Hat Discovery 2 | Versions not published | |
| Red Hat Satellite 6 | Versions not published | |
| Django 6.0 | 6.0 → < 6.0.3 | 6.0.3 |
| Django 5.2 | 5.2 → < 5.2.12 | 5.2.12 |
| Django 4.2 | 4.2 → < 4.2.29 | 4.2.29 |
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