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Allocation of Resources Without Limits or Throttling

CVE-2026-25673

High
7.5/10

Summary

Django contains a denial of service vulnerability in "URLField.to_python()", which calls "urllib.parse.urlsplit()". On Windows, this function performs NFKC normalization that can be disproportionately slow for certain Unicode characters, allowing a remote attacker to cause denial of service via large URL inputs containing such characters. This issue affects Django versions through 4.2.28 , 5.X through 5.2.11 and 6.X through 6.0.2. This issue is fixed in versions 6.0.3, 5.2.12, and 4.2.29.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • NONE
  • HIGH

CWE-770 - Allocation of Resources Without Limits or Throttling

The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.

References

Advisory Timeline

  • Published