Copyright © 2012 Red Hat, Inc. All rights reserved. Low 2026-06-03T13:16:29 Django: Django: Information disclosure due to improper handling of Cache-Control directives 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N CWE-1289

An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6. `django.middleware.cache.UpdateCacheMiddleware` in Django does not match `Cache-Control` response directives case-insensitively, which allows remote attackers to read responses that were incorrectly cached because their `Cache-Control` directives used uppercase or mixed-case values. 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 Ahmed Badawe for reporting this issue.

A flaw was found in Django. The `django.middleware.cache.UpdateCacheMiddleware` component does not correctly process `Cache-Control` response directives when they use uppercase or mixed-case values. This vulnerability allows a remote attacker to read responses that should not have been cached, leading to information disclosure.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-24/lightspeed-rhel8 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-25/lightspeed-rhel8 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-26/controller-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-26/eda-controller-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-26/gateway-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-26/hub-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-26/lightspeed-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-27/aap-cloud-billing-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-27/controller-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-27/eda-controller-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-27/gateway-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-27/hub-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-27/lightspeed-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-27/metrics-service-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform/automation-dashboard-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-tech-preview/metrics-service-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred automation-controller Red Hat Discovery 2 Fix deferred discovery/discovery-server-rhel9 Red Hat Satellite 6 Fix deferred satellite/iop-advisor-backend-rhel9 Self-service automation portal 2 Under investigation ansible-automation-platform/bootc-automation-portal-rhel9 https://www.cve.org/CVERecord?id=CVE-2026-8404 https://nvd.nist.gov/vuln/detail/CVE-2026-8404 https://docs.djangoproject.com/en/dev/releases/security/ https://groups.google.com/g/django-announce https://www.djangoproject.com/weblog/2026/jun/03/security-releases/