# CVE-2026-8404: python3-django: An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6

CVE-2026-8404 is fixed in 3 products on 1 platform, first by python3-django 2:2.2.12-1ubuntu0.29+esm10, released June 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-8404
- Priority: Routine
- CVSS: 5.3 (Low)
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 3, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-Django opensuse-leap 16.0 | 5.2.4-bp160.9.1 | [OPENSUSE-SU-2026:20937-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20937-1.md) | Jun 10, 2026 |
| Linux | python-Django sles 15.7 | 4.2.11-150600.3.59.1 | [SUSE-SU-2026:2318-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2318-1.md) | Jun 9, 2026 |
| Linux | python-django Debian 14 | 3:5.2.15-1 | [DEBIAN-CVE-2026-8404](https://patchblox.com/security/data/fix/linux/debian-cve-2026-8404.md) | Jun 25, 2026 |
| Linux | python3-django Ubuntu 20.04 LTS (focal) | 2:2.2.12-1ubuntu0.29+esm10 | [python3-django 2:2.2.12-1ubuntu0.29+esm10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-django-2-2.2.12-1ubuntu0.29-esm10.md) | Jun 3, 2026 |
| Linux | python3-django Ubuntu 22.04.1 LTS (jammy) | 2:3.2.12-2ubuntu1.29 | [python3-django 2:3.2.12-2ubuntu1.29](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-django-2-3.2.12-2ubuntu1.29.md) | Aug 4, 2026 |
| Linux | python3-django Ubuntu 24.04.5 LTS (noble) | 3:4.2.11-1ubuntu1.18 | [python3-django 3:4.2.11-1ubuntu1.18](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-django-3-4.2.11-1ubuntu1.18.md) | Aug 4, 2026 |
| Linux | python3-django Ubuntu 26.04.1 LTS (resolute) | 3:5.2.9-0ubuntu4.3 | [python3-django 3:5.2.9-0ubuntu4.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-django-3-5.2.9-0ubuntu4.3.md) | Aug 4, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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