CVE-2026-53878

MEDIUM 6.1

Header injection possibility since DomainNameValidator accepted newlines in input

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-144
Vendor	djangoproject
Product	django
Published	Jul 7, 2026
Last Updated	Jul 7, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

djangoproject / Django

6.0 < 6.0.7 5.2 < 5.2.16

References

NVD ↗ CVE.org ↗ EPSS Data ↗

docs.djangoproject.com: https://docs.djangoproject.com/en/dev/releases/security/ groups.google.com: https://groups.google.com/g/django-announce djangoproject.com: https://www.djangoproject.com/weblog/2026/jul/07/security-releases/

Credits

🔍 Bence Nagy Natalia Bidart Jacob Walls