Vulnerability from bitnami_vulndb
Published
2025-09-25 08:40
Modified
2025-10-06 00:06
Summary
Details

An issue was discovered in Django 5.1 before 5.1.8 and 5.0 before 5.0.14. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.views.LoginView, django.contrib.auth.views.LogoutView, and django.views.i18n.set_language are subject to a potential denial-of-service attack via certain inputs with a very large number of Unicode characters.

To clipboard Create KEV Entry 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "django",
        "purl": "pkg:bitnami/django"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.0.14"
            },
            {
              "introduced": "5.1.0"
            },
            {
              "fixed": "5.1.8"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-27556"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:djangoproject:django:*:*:*:*:*:python:*:*"
    ],
    "severity": "High"
  },
  "details": "An issue was discovered in Django 5.1 before 5.1.8 and 5.0 before 5.0.14. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.views.LoginView, django.contrib.auth.views.LogoutView, and django.views.i18n.set_language are subject to a potential denial-of-service attack via certain inputs with a very large number of Unicode characters.",
  "id": "BIT-django-2025-27556",
  "modified": "2025-10-06T00:06:00.502Z",
  "published": "2025-09-25T08:40:31.995Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/04/02/2"
    },
    {
      "type": "WEB",
      "url": "https://docs.djangoproject.com/en/dev/releases/security/"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/django-announce"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27556"
    },
    {
      "type": "WEB",
      "url": "https://www.djangoproject.com/weblog/2025/apr/02/security-releases/"
    }
  ],
  "schema_version": "1.6.2"
}


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