---
id: CVE-2026-5766
aliases:
  - GHSA-w26r-rmm8-9c29
  - BIT-django-2026-5766
  - PYSEC-2026-54
title: Django has an Improper Handling of Length Parameter Inconsistency
summary: Django has an Improper Handling of Length Parameter Inconsistency
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
vendor: django
product: django
ecosystem: pip
affected:
  - 'django >= 6.0, < 6.0.5'
  - 'django >= 5.2, < 5.2.14'
patched:
  - django 6.0.5
  - django 5.2.14
published: '2026-05-05'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:51:07.187650691Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-w26r-rmm8-9c29'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-5766'
  - 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-2026-54.yaml
  - url: 'https://groups.google.com/g/django-announce'
  - url: 'https://www.djangoproject.com/weblog/2026/may/05/security-releases'
tags:
  - osv
  - pip
epss: 0.00516
epssPercentile: 0.41491
ingestedAt: '2026-09-12T03:13:01.732Z'
---

## Overview

An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. ASGI requests with a missing or understated `Content-Length` header can bypass the `FILE_UPLOAD_MAX_MEMORY_SIZE` limit, potentially loading large files into memory and causing service degradation.
 
As a reminder, Django expects a limit to be configured at the web server level rather than solely relying on `FILE_UPLOAD_MAX_MEMORY_SIZE`. 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 thanks Kyle Agronick for reporting this issue.

## Affected packages

- `django >= 6.0, < 6.0.5`
- `django >= 5.2, < 5.2.14`

## Remediation

Upgrade to a patched release:

- `django 6.0.5`
- `django 5.2.14`