{"id":"CVE-2023-46695","aliases":["BIT-django-2023-46695","GHSA-qmf9-6jqf-j8fq","PYSEC-2023-222"],"url":"https://o3.security/vulnerability/CVE-2023-46695","summary":"Django potential denial of service vulnerability in UsernameField on Windows","details":"An issue was discovered in Django 3.2 before 3.2.23, 4.1 before 4.1.13, and 4.2 before 4.2.7. The NFKC normalization is slow on Windows. As a consequence, django.contrib.auth.forms.UsernameField is subject to a potential DoS (denial of service) attack via certain inputs with a very large number of Unicode characters.","published":"2023-11-02T00:00:00Z","modified":"2026-08-12T03:51:42.630471536Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"django","fixedVersion":"3.2.23"},{"ecosystem":"PyPI","name":"django","fixedVersion":"4.1.13"},{"ecosystem":"PyPI","name":"django","fixedVersion":"4.2.7"}],"fix":{"url":"https://github.com/django/django/commit/048a9ebb6ea468426cb4e57c71572cbbd975517f","label":"django/django@048a9eb"},"references":[{"type":"WEB","url":"https://docs.djangoproject.com/en/4.2/releases/security/"},{"type":"WEB","url":"https://groups.google.com/forum/#%21forum/django-announce"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/46xxx/CVE-2023-46695.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-46695"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20231214-0001/"},{"type":"ARTICLE","url":"https://www.djangoproject.com/weblog/2023/nov/01/security-releases/"},{"type":"WEB","url":"https://github.com/django/django/commit/048a9ebb6ea468426cb4e57c71572cbbd975517f"},{"type":"WEB","url":"https://github.com/django/django/commit/4965bfdde2e5a5c883685019e57d123a3368a75e"},{"type":"WEB","url":"https://github.com/django/django/commit/f9a7fb8466a7ba4857eaf930099b5258f3eafb2b"},{"type":"WEB","url":"https://docs.djangoproject.com/en/4.2/releases/security"},{"type":"PACKAGE","url":"https://github.com/django/django"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2023-222.yaml"},{"type":"WEB","url":"https://groups.google.com/forum/#!forum/django-announce"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20231214-0001"},{"type":"WEB","url":"https://www.djangoproject.com/weblog/2023/nov/01/security-releases"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:42.630471536Z"}}