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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

References

Timeline

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