CVE-2026-53878
Header injection possibility since DomainNameValidator accepted newlines in input
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.
INFO
Published Date :
July 7, 2026, 3:16 p.m.
Last Modified :
July 7, 2026, 3:16 p.m.
Remotely Exploit :
Yes !
Source :
6a34fbeb-21d4-45e7-8e0a-62b95bc12c92
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 | ||||
| CVSS 4.0 | MEDIUM | 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 |
Solution
- Update Django to version 6.0.7 or 5.2.16.
- Apply vendor patches if using older Django versions.
- Avoid using values with newlines in HTTP headers.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53878.
| URL | Resource |
|---|---|
| https://docs.djangoproject.com/en/dev/releases/security/ | |
| https://groups.google.com/g/django-announce | |
| https://www.djangoproject.com/weblog/2026/jul/07/security-releases/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53878 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53878
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53878 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53878 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92
Jul. 07, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/django/django/', 'vendor': 'djangoproject', 'product': 'Django', 'versions': [{'status': 'affected', 'version': '6.0', 'lessThan': '6.0.7', 'versionType': 'python'}, {'status': 'unaffected', 'version': '6.0.7', 'versionType': 'python'}, {'status': 'affected', 'version': '5.2', 'lessThan': '5.2.16', 'versionType': 'python'}, {'status': 'unaffected', 'version': '5.2.16', 'versionType': 'python'}], 'packageName': 'django', 'collectionURL': 'https://pypi.org/project/Django/', 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Added CWE CWE-144 Added Reference https://docs.djangoproject.com/en/dev/releases/security/ Added Reference https://groups.google.com/g/django-announce Added Reference https://www.djangoproject.com/weblog/2026/jul/07/security-releases/