# CVE-2026-53878: python-django: An issue was discovered in Django 6.0 before 6.0.7 and 5.2 before 5.2.16

CVE-2026-53878 is fixed in 2 products on 1 platform, first by OPENSUSE-SU-2026:21313-1, released July 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-53878
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0033
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 7, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-Django opensuse-leap 16.0 | 5.2.4-bp160.10.1 | [OPENSUSE-SU-2026:21313-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21313-1.md) | Jul 10, 2026 |
| Linux | python-django Debian 14 | 3:5.2.16-1 | [DEBIAN-CVE-2026-53878](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53878.md) | Jul 10, 2026 |

---

Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.