CVE-2026-8404 Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCacheMiddleware
Attackers can read sensitive cached responses because Django's cache middleware fails to match Cache-Control directives case-insensitively.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-8404?
CVE-2026-8404 is a low-severity vulnerability in Djangoproject Django, published on 3 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-178
Which versions are affected by CVE-2026-8404?
6 open source packages ship an affected version, including django. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
django Bitnami | From 5.2.0 | 5.2.15, 6.0.6 |
django PyPI | All versions | 5.2.15 |
django PyPI | All versions | 5.2.15 |
django PyPI | From 5.2 | 5.2.15, 6.0.6 |
django PyPI | From 6.0.0 | 6.0.6 |
django PyPI | From 6.0.0 | 6.0.6 |
Products include Djangoproject Django.
How do I fix CVE-2026-8404?
Upgrade django to a fixed version for your release line: 5.2.15 or 6.0.6.
Is CVE-2026-8404 being exploited?
There is no known exploitation of CVE-2026-8404 in the wild and no public exploit code.
Other vulnerabilities in Djangoproject Django
- CVE-2026-4277 Privilege abuse in GenericInlineModelAdmin
- CVE-2024-53908 Django SQL injection in HasKey(lhs, rhs) on Oracle
- CVE-2024-42005 Django SQL injection vulnerability
- CVE-2023-31047 Django bypasses validation when using one form field to upload multiple files
- CVE-2022-34265 Django `Trunc()` and `Extract()` database functions vulnerable to SQL Injection
Sources
Also known as BIT-django-2026-8404, DEBIAN-CVE-2026-8404, ECHO-a707-d13a-55ba, GHSA-8cjm-8mp7-r2xf, MINI-96q7-rxvv-qxrh, MINI-wgm2-q4p5-2jww and 2 more.