CVE-2025-27556

HIGH EPSS 56.1%
Published Apr 2, 20251y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Apr 2, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
56.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-770

Affected Products 3

VendorProductVersionRange
djangoprojectdjango*≥5.0  –  <5.0.14
djangoprojectdjango*≥5.1  –  <5.1.8
microsoftwindows*any

References 4

  • openwall.com http://www.openwall.com/lists/oss-security/2025/04/02/2
    Mailing ListThird Party Advisory
  • docs.djangoproject.com https://docs.djangoproject.com/en/dev/releases/security/
    Vendor Advisory
  • groups.google.com https://groups.google.com/g/django-announce
    Vendor Advisory
  • djangoproject.com https://www.djangoproject.com/weblog/2025/apr/02/security-releases/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.