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GHSA-8p8v-wh79-9r56

Django vulnerable to Uncontrolled Resource Consumption

Source: GitHub Advisory Database (reviewed) High CVE-2026-25673

Packages

EcosystemPackageAffectedFixed in
PyPI Django >= 6.0, < 6.0.3 6.0.3
PyPI Django >= 5.2, < 5.2.12 5.2.12
PyPI Django >= 4.2, < 4.2.29 4.2.29

Details

As written in the advisory (Markdown source, shown as plain text).

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

External links from the advisory. They lead to third-party sites.