---
id: CVE-2026-33033
aliases:
  - GHSA-5mf9-h53q-7mhq
  - BIT-django-2026-33033
  - PYSEC-2026-48
title: Django has potential DoS via MultiPartParser through crafted multipart uploads
summary: Django has potential DoS via MultiPartParser through crafted multipart uploads
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
vendor: django
product: django
ecosystem: pip
affected:
  - 'django >= 6.0, < 6.0.4'
  - 'django >= 5.2, < 5.2.13'
  - 'django >= 4.2, < 4.2.30'
patched:
  - django 6.0.4
  - django 5.2.13
  - django 4.2.30
published: '2026-04-07'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:43.008740278Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-5mf9-h53q-7mhq'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-33033'
  - 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-2026-48.yaml
  - url: 'https://groups.google.com/g/django-announce'
  - url: 'https://www.djangoproject.com/weblog/2026/apr/07/security-releases'
tags:
  - osv
  - pip
  - exploit-available
epss: 0.00879
epssPercentile: 0.57571
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/ch4n3-yoon/CVE-2026-33033-PoC'
  checkedAt: '2026-09-24T07:53:02.300Z'
exploitAvailable: true
ingestedAt: '2026-09-12T03:13:01.660Z'
---

## Overview

An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30. `MultiPartParser` allows remote attackers to degrade performance by submitting multipart uploads with `Content-Transfer-Encoding: base64` including excessive whitespace.

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.

## Affected packages

- `django >= 6.0, < 6.0.4`
- `django >= 5.2, < 5.2.13`
- `django >= 4.2, < 4.2.30`

## Remediation

Upgrade to a patched release:

- `django 6.0.4`
- `django 5.2.13`
- `django 4.2.30`