PT-2026-56197 · Djangoproject · Django

Bence Nagy + 2 · Published 2026-07-07 · Updated 2026-07-07 · CVE-2026-53878

Mitre

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

An issue was discovered in Django 6.0 before 6.0.7 and 5.2 before 5.2.16. DomainNameValidator does not prohibit newlines in domain names (unless used via a form field, since CharField strips newlines). If an application uses values with newlines in an HTTP response, header injection can occur. Django itself is unaffected because HttpResponse prohibits newlines in HTTP headers. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Bence Nagy for reporting this issue.

Fix

Weakness Enumeration

CWE-144

Related Identifiers

CVE-2026-53878

Affected Products

Django

References · 4

• https://docs.djangoproject.com/en/dev/releases/security · Vendor Advisory
• https://djangoproject.com/weblog/2026/jul/07/security-releases · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-53878 · Security Note
• https://groups.google.com/g/django-announce · Note