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CVE-2025-64458— Potential denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows

Quick assessment

Affected
djangoproject Django
Exploitation
Public or AI PoC available; prioritize validation
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基金会的一套基于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 5.1版本至5.1.14之前版本、4.2版本至4.2.26之前版本和5.2版本至5.2.8之前版本存在安全漏洞，该漏洞源于Windows上的NFKC规范化处理速度较慢，可能导致拒绝服务攻击。

AI Predicted 7.5 Difficulty: Easy EPSS 1.90% · P78

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-64458

Vulnerability Information
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Vulnerability Title
Potential denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in 5.1 before 5.1.14, 4.2 before 4.2.26, and 5.2 before 5.2.8. NFKC normalization in Python is slow on Windows. As a consequence, `django.http.HttpResponseRedirect`, `django.http.HttpResponsePermanentRedirect`, and the shortcut `django.shortcuts.redirect` were subject to a potential denial-of-service attack via certain inputs with a very large number of Unicode characters. 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 Seokchan Yoon for reporting this issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5
Vulnerability Title
Django 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Django是Django基金会的一套基于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 5.1版本至5.1.14之前版本、4.2版本至4.2.26之前版本和5.2版本至5.2.8之前版本存在安全漏洞，该漏洞源于Windows上的NFKC规范化处理速度较慢，可能导致拒绝服务攻击。
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 5.2 ~ 5.2.8 -

II. Public POCs for CVE-2025-64458

# POC Description Source Link Shenlong Link
1 A PoC script for demonstrating CVE 2025-64458, found in Django, potential DoS in `HttpResponseRedirect`/`HttpResponsePermanentRedirect` on Windows. https://github.com/ch4n3-yoon/CVE-2025-64458-Demo POC Details
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III. Intelligence Information for CVE-2025-64458

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Vendor Advisories for CVE-2025-64458 (1)

Mailing List Discussions for CVE-2025-64458 (1)

IV. Related Vulnerabilities

Same product: Django
Same vendor: djangoproject
Same weakness: CWE-407

V. Comments for CVE-2025-64458

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