CVE-2025-64458: Django Django Has A Denial-of-service Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-qw25-v68c-qjf3
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CVSS 7.5
CWE-407
Published
Advisory Summary

CVE-2025-64458 is a HIGH (CVSS 7.5) django has a denial-of-service vulnerability vulnerability (CWE-407: Inefficient Algorithmic Complexity) affecting Django libraries in the PyPI ecosystem. The issue involves django has a denial-of-service vulnerability in httpresponseredirect and httpresponsepermanentredirect on windows. Remediation is available by upgrading affected packages to version 5.2.8, 5.1.14, 4.2.26.

CVE-2025-64458 at a Glance

CVE Identifier CVE-2025-64458
GHSA Identifier GHSA-qw25-v68c-qjf3
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-407: Inefficient Algorithmic Complexity
Affected Product Django
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2025-64458

To remediate this vulnerability, upgrade all affected Django dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

django fixed: 5.2.8 
pip install django>=5.2.8
django fixed: 5.1.14 
pip install django>=5.1.14
django fixed: 4.2.26 
pip install django>=4.2.26
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show django

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-64458, inspect your installed packages using pip:

pip show django

Analyze the terminal output to locate any version of Django in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.2.8), your application is affected.

Note: The pip show django command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-407: Inefficient Algorithmic Complexity, where an algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached. In Django, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2025-64458 Affected Django Versions

3 component(s)
Fixed Versions:
5.2.85.1.144.2.26
Product / Package Ecosystem Affected Versions Fixed Version
django
pypi/django
PyPI
≥ 5.2a1
< 5.2.8
5.2.8
django
pypi/django
PyPI
≥ 5.0a1
< 5.1.14
5.1.14
django
pypi/django
PyPI
< 4.2.26
4.2.26

References

NVD — CVE-2025-64458 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-64458
Security Fix Commit FIX COMMIT
https://github.com/django/django/commit/3790593781d26168e7306b5b2f8ea0309de16242
Security Fix Commit FIX COMMIT
https://github.com/django/django/commit/4f5d904b63751dea9ffc3b0e046404a7fa5881ac
Security Fix Commit FIX COMMIT
https://github.com/django/django/commit/6e13348436fccf8f22982921d6a3a3e65c956a9f
Security Fix Commit FIX COMMIT
https://github.com/django/django/commit/770eea38d7a0e9ba9455140b5a9a9e33618226a7
Django Release RELEASE
https://docs.djangoproject.com/en/dev/releases/security
Django Source Repository REPOSITORY
https://github.com/django/django
Django Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2025-107.yaml
groups.google.com/g/django-announce WEB
https://groups.google.com/g/django-announce
Django Release RELEASE
https://www.djangoproject.com/weblog/2025/nov/05/security-releases

Frequently Asked Questions

What is CVE-2025-64458?
CVE-2025-64458 is a security vulnerability in Django involving Django has a denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows under CWE-407: Inefficient Algorithmic Complexity.
Which Django versions are affected?
Affected versions include releases prior to 5.2.8, 5.1.14, 4.2.26 across affected packages: django.
What version fixes CVE-2025-64458?
Upgrading to 5.2.8, 5.1.14, 4.2.26 (or the latest patched release for your respective branch) resolves the vulnerability.
Is django affected?
Yes, django is affected in releases prior to 5.2.8, 5.1.14, 4.2.26. Upgrade your dependency to 5.2.8, 5.1.14, 4.2.26 or later.
What is the CVSS score of CVE-2025-64458?
CVE-2025-64458 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2025-64458?
CVE-2025-64458 is classified under CWE-407: Inefficient Algorithmic Complexity (An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.).
How can I check PyPI dependencies for CVE-2025-64458?
Run the dependency tree command: 'pip show django'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qw25-v68c-qjf3",
  "modified" : "2026-06-05T14:33:43Z",
  "published" : "2025-11-05T15:31:07Z",
  "aliases" : [ "CVE-2025-64458" ],
  "summary" : "Django has a denial-of-service vulnerability in HttpResponseRedirect and HttpResponsePermanentRedirect on Windows",
  "details" : "An issue was discovered in 5.1 before 5.1.14, 4.2 before 4.2.26, and 5.2 before 5.2.8.\nNFKC 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.\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\nDjango would like to thank Seokchan Yoon for reporting this issue.",
  "severity" : [ {
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    },
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  }, {
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    "ranges" : [ {
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  "references" : [ {
    "type" : "ADVISORY",
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  }, {
    "type" : "WEB",
    "url" : "https://github.com/django/django/commit/3790593781d26168e7306b5b2f8ea0309de16242"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/django/django/commit/4f5d904b63751dea9ffc3b0e046404a7fa5881ac"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/django/django/commit/6e13348436fccf8f22982921d6a3a3e65c956a9f"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/django/django/commit/770eea38d7a0e9ba9455140b5a9a9e33618226a7"
  }, {
    "type" : "WEB",
    "url" : "https://docs.djangoproject.com/en/dev/releases/security"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/django/django"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2025-107.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/g/django-announce"
  }, {
    "type" : "WEB",
    "url" : "https://www.djangoproject.com/weblog/2025/nov/05/security-releases"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-407" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-11-05T19:55:37Z",
    "nvd_published_at" : "2025-11-05T15:15:40Z"
  }
}