CVE-2025-64458

Summary

An issue was discovered in 5.1 before 5.1.14, 4.2 before 4.2.26, and 5.2 before 5.2.8. NFKC normalization in Python is slow on Windows. As a consequence, django.http.HttpResponseRedirect, django.http.HttpResponsePermanentRedirect, and the shortcut django.shortcuts.redirect were subject to a potential denial-of-service attack via certain inputs with a very large number of Unicode 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 Software

VendorProductVersion RangeStatus
djangoprojectDjango5.2 < 5.2.8affected
djangoprojectDjango5.2.8unaffected
djangoprojectDjango5.1 < 5.1.14affected
djangoprojectDjango5.1.14unaffected
djangoprojectDjango4.2 < 4.2.26affected
djangoprojectDjango4.2.26unaffected

Weaknesses

  • CWE-407: CWE-407: Inefficient Algorithmic Complexity

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References