{"schema_version":"1.9.0","id":"BIT-django-2025-27556","published":"2025-09-25T08:40:31.995Z","modified":"2026-09-08T08:46:35.599923497Z","aliases":["CVE-2025-27556","GHSA-wqfg-m96j-85vm","PYSEC-2025-14"],"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.","affected":[{"package":{"name":"django","ecosystem":"Bitnami","purl":"pkg:bitnami/django"},"ranges":[{"type":"SEMVER","events":[{"introduced":"5.0.0"},{"fixed":"5.0.14"},{"introduced":"5.1.0"},{"fixed":"5.1.8"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/django/BIT-django-2025-27556.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}],"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2025/04/02/2"},{"type":"ADVISORY","url":"https://docs.djangoproject.com/en/dev/releases/security/"},{"type":"ADVISORY","url":"https://groups.google.com/g/django-announce"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-27556"},{"type":"ADVISORY","url":"https://www.djangoproject.com/weblog/2025/apr/02/security-releases/"}],"database_specific":{"cpes":["cpe:2.3:a:djangoproject:django:*:*:*:*:*:python:*:*"],"severity":"High"}}