Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Djangoproject | Django | >= 5.2, < 5.2.16 |
Related Weaknesses (CWE)
References
- https://docs.djangoproject.com/en/dev/releases/security/PatchVendor Advisory
- https://groups.google.com/g/django-announceRelease Notes
- https://www.djangoproject.com/weblog/2026/jul/07/security-releases/Vendor AdvisoryPatch
FAQ
What is CVE-2026-53878?
CVE-2026-53878 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 newli...
How severe is CVE-2026-53878?
CVE-2026-53878 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53878?
Check the references section above for vendor advisories and patch information. Affected products include: Djangoproject Django.