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CVE-2026-53878— Header injection possibility since DomainNameValidator accepted newlines in input

Quick assessment

Affected
djangoproject Django
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Django是Django团队开源的一套基于Python语言的开源Web应用框架。该框架包括面向对象的映射器、视图系统、模板系统等。 Django 6.0.7之前版本和5.2.16之前版本存在输入验证错误漏洞，该漏洞源于DomainNameValidator未禁止域名中的换行符，如果应用将含换行符的值用于HTTP响应，可能导致标头注入。

CVSS 6.1 · Medium EPSS 0.33% · P24

Affected Version Matrix 4

VendorProduct Version RangeStatus
djangoproject Django 6.0< 6.0.7 affected
6.0.7 unaffected
5.2< 5.2.16 affected
5.2.16 unaffected
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I. Basic Information for CVE-2026-53878

Vulnerability Information
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Vulnerability Title
Header injection possibility since DomainNameValidator accepted newlines in input
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
行分隔符转义处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Django 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Django是Django团队开源的一套基于Python语言的开源Web应用框架。该框架包括面向对象的映射器、视图系统、模板系统等。 Django 6.0.7之前版本和5.2.16之前版本存在输入验证错误漏洞，该漏洞源于DomainNameValidator未禁止域名中的换行符，如果应用将含换行符的值用于HTTP响应，可能导致标头注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
djangoproject Django 6.0 ~ 6.0.7 -

II. Public POCs for CVE-2026-53878

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III. Intelligence Information for CVE-2026-53878

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Vendor Advisories for CVE-2026-53878 (2)

Mailing List Discussions for CVE-2026-53878 (1)

Same Patch Batch · djangoproject · 2026-07-07 · 3 CVEs total

CVE-2026-53877 4.8 MEDIUM Heap buffer over-read in GDALRaster
CVE-2026-48588 4.2 MEDIUM Potential exposure of private data via cached Set-Cookie response

IV. Related Vulnerabilities

Same product: Django
Same vendor: djangoproject
Same weakness: CWE-144

V. Comments for CVE-2026-53878

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