CVE-2026-53878
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.
How to fix
- djangoproject django5.2.16, 6.0.7 or later
- django5.2.16, 6.0.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| djangoproject django | 5.2 ≤ v < 5.2.16, 6.0 ≤ v < 6.0.7 | 5.2.16, 6.0.7 |
| djangoPyPI | v < 5.2.16, 6.0.0 ≤ v < 6.0.7, 5.2 ≤ v < 5.2.16, 6.0 ≤ v < 6.0.7 | 5.2.16, 6.0.7 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.