---
id: CVE-2026-53878
aliases:
  - GHSA-8qcx-xf44-272x
  - BIT-django-2026-53878
  - PYSEC-2026-2092
title: >-
  Django: DomainNameValidator permits newline characters that may enable HTTP
  header injection
summary: >-
  Django: DomainNameValidator permits newline characters that may enable HTTP
  header injection
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
vendor: django
product: django
ecosystem: pip
affected:
  - django < 5.2.16
  - 'django >= 6.0.0, < 6.0.7'
patched:
  - django 5.2.16
  - django 6.0.7
published: '2026-07-07'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:51:11.070082151Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-8qcx-xf44-272x'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53878'
  - url: >-
      https://github.com/django/django/commit/3a720d0d8bf2529253b98968f10ca73daf6d693c
  - url: >-
      https://github.com/django/django/commit/a5de13f1491f1dbf2bb0ad9b91570524ebbc8acd
  - url: >-
      https://github.com/django/django/commit/d5d60ed0323cddaa0ce0237a26a3d49ac21ee05e
  - url: 'https://docs.djangoproject.com/en/dev/releases/security'
  - url: 'https://github.com/django/django'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-2092.yaml
  - url: 'https://groups.google.com/g/django-announce'
  - url: 'https://www.djangoproject.com/weblog/2026/jul/07/security-releases'
  - url: 'https://docs.djangoproject.com/en/dev/releases/security/'
  - url: 'https://www.djangoproject.com/weblog/2026/jul/07/security-releases/'
tags:
  - osv
  - pip
epss: 0.00327
epssPercentile: 0.23232
ingestedAt: '2026-07-10T18:56:50.636Z'
---

## Overview

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.

## Affected packages

- `django < 5.2.16`
- `django >= 6.0.0, < 6.0.7`

## Remediation

Upgrade to a patched release:

- `django 5.2.16`
- `django 6.0.7`