---
id: CVE-2024-56374
aliases:
  - GHSA-qcgg-j2x8-h9g8
  - BIT-django-2024-56374
  - PYSEC-2025-1
title: Django has a potential denial-of-service vulnerability in IPv6 validation
summary: Django has a potential denial-of-service vulnerability in IPv6 validation
severity: medium
cvss: 5.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L'
vendor: django
product: django
ecosystem: pip
affected:
  - 'django >= 5.1, < 5.1.5'
  - 'django >= 5.0, < 5.0.11'
  - 'django >= 4.2, < 4.2.18'
  - 'django >= 5.1, < 5.1.5'
  - 'django >= 5.0, < 5.0.11'
  - 'django >= 4.2, < 4.2.18'
patched:
  - django 5.1.5
  - django 5.0.11
  - django 4.2.18
  - django 5.1.5
  - django 5.0.11
  - django 4.2.18
published: '2025-01-14'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:22.125731749Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-qcgg-j2x8-h9g8'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-56374'
  - url: >-
      https://github.com/django/django/commit/4806731e58f3e8700a3c802e77899d54ac6021fe
  - url: >-
      https://github.com/django/django/commit/ad866a1ca3e7d60da888d25d27e46a8adb2ed36e
  - url: >-
      https://github.com/django/django/commit/ca2be7724e1244a4cb723de40a070f873c6e94bf
  - url: >-
      https://github.com/django/django/commit/e8d4a2005955dcf962193600b53bf461b190b455
  - 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-2025-1.yaml
  - url: 'https://groups.google.com/g/django-announce'
  - url: 'https://lists.debian.org/debian-lts-announce/2025/01/msg00024.html'
  - url: 'https://www.djangoproject.com/weblog/2025/jan/14/security-releases'
  - url: 'http://www.openwall.com/lists/oss-security/2025/01/14/2'
tags:
  - osv
  - pip
epss: 0.01923
epssPercentile: 0.79068
ingestedAt: '2026-09-12T03:13:01.721Z'
---

## Overview

An issue was discovered in Django 5.1 before 5.1.5, 5.0 before 5.0.11, and 4.2 before 4.2.18. Lack of upper-bound limit enforcement in strings passed when performing IPv6 validation could lead to a potential denial-of-service attack. The undocumented and private functions `clean_ipv6_address` and `is_valid_ipv6_address` are vulnerable, as is the `django.forms.GenericIPAddressField` form field. (The django.db.models.GenericIPAddressField model field is not affected.)

## Affected packages

- `django >= 5.1, < 5.1.5`
- `django >= 5.0, < 5.0.11`
- `django >= 4.2, < 4.2.18`
- `django >= 5.1, < 5.1.5`
- `django >= 5.0, < 5.0.11`
- `django >= 4.2, < 4.2.18`

## Remediation

Upgrade to a patched release:

- `django 5.1.5`
- `django 5.0.11`
- `django 4.2.18`
- `django 5.1.5`
- `django 5.0.11`
- `django 4.2.18`