---
id: CVE-2026-6873
aliases:
  - GHSA-h7pc-vwp9-298g
  - BIT-django-2026-6873
  - PYSEC-2026-199
title: 'Django: signed cookies are vulnerable to salt namespace collisions'
summary: 'Django: signed cookies are vulnerable to salt namespace collisions'
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'
vendor: django
product: django
ecosystem: pip
affected:
  - django < 5.2.15
  - 'django >= 6.0.0, < 6.0.6'
patched:
  - django 5.2.15
  - django 6.0.6
published: '2026-06-03'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:49.784603324Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-h7pc-vwp9-298g'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-6873'
  - url: >-
      https://github.com/django/django/commit/594360cbf58be7f56eb6da96d58644297c99ef85
  - url: >-
      https://github.com/django/django/commit/70d36515b9cc71700105a14b275583070d48b689
  - url: >-
      https://github.com/django/django/commit/c807d9c398022d23cb27518fa6ecaf343efb30cf
  - 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-2026-199.yaml
  - url: 'https://groups.google.com/g/django-announce'
  - url: 'https://www.djangoproject.com/weblog/2026/jun/03/security-releases'
tags:
  - osv
  - pip
epss: 0.00281
epssPercentile: 0.18367
ingestedAt: '2026-08-08T19:14:54.589Z'
---

## Overview

An issue was discovered in Django 6.0 before 6.0.6 and 5.2 before 5.2.15.
`django.http.HttpRequest.get_signed_cookie` in Django uses a non-injective salt derivation (concatenating the cookie name and salt argument), which allows a remote attacker to use a cookie in a context different from the one where it was signed, via distinct `(name, salt)` pairs that produce the same concatenation.
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 Peng Zhou for reporting this issue.

## Affected packages

- `django < 5.2.15`
- `django >= 6.0.0, < 6.0.6`

## Remediation

Upgrade to a patched release:

- `django 5.2.15`
- `django 6.0.6`