CVE-2026-8404
Fixed in a distro release EPSS <1%CVSS 3.1
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.
Products: djangoproject django
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| PyPI | django | 5.2.15 |
| PyPI | django | 6.0.6 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | authentik-2025.12 | no fix |
| Chainguard | authentik-fips-2025.12 | no fix |
| Chainguard | awx | no fix |
| Chainguard | openstack-horizon-2025.1 | no fix |
| Chainguard | openstack-horizon-2025.1-fips | no fix |
| Chainguard | openstack-horizon-2025.2 | no fix |
| Chainguard | openstack-horizon-2025.2-fips | no fix |
| Chainguard | openstack-horizon-2026.1 | 25.7.3_git20260806-r1 |
| Chainguard | openstack-horizon-2026.1-fips | 25.7.3_git20260806-r1 |
| Debian:12 | python-django | no fix |
| Debian:13 | python-django | no fix |
| Debian:14 | python-django | 3:5.2.15-1 |
| SUSE:Linux Enterprise Module for Package Hub 15 SP7 | python-Django | 4.2.11-150600.3.59.1 |
| Ubuntu:22.04:LTS | python-django | 2:3.2.12-2ubuntu1.29 |
| Ubuntu:24.04:LTS | python-django | 3:4.2.11-1ubuntu1.18 |
| Ubuntu:25.10 | python-django | no fix |
| Ubuntu:26.04:LTS | python-django | 3:5.2.9-0ubuntu4.3 |
| Ubuntu:Pro:14.04:LTS | python-django | 1.6.11-0ubuntu1.3+esm12 |
| Ubuntu:Pro:16.04:LTS | python-django | 1.8.7-1ubuntu5.15+esm13 |
| Ubuntu:Pro:18.04:LTS | python-django | 1:1.11.11-1ubuntu1.21+esm17 |
| Ubuntu:Pro:20.04:LTS | python-django | 2:2.2.12-1ubuntu0.29+esm10 |
| openSUSE:Leap 16.0 | python-Django | 5.2.4-bp160.9.1 |
| openSUSE:Tumbleweed | python-Django | 5.2.15-1.1 |
| openSUSE:Tumbleweed | python-Django4 | 4.2.30-3.1 |
| openSUSE:Tumbleweed | python-Django5 | 5.2.16-1.1 |
| openSUSE:Tumbleweed | python-Django6 | 6.0.6-1.1 |