Low severity3.1NVD Advisory· Published Jun 3, 2026· Updated Jul 21, 2026
CVE-2026-8404
CVE-2026-8404
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
djangoPyPI | < 5.2.15 | 5.2.15 |
djangoPyPI | >= 6.0.0, < 6.0.6 | 6.0.6 |
Affected products
12- Range: <5.2.15, <6.0.6
- osv-coords9 versionspkg:apk/chainguard/openstack-horizon-2026.1pkg:apk/chainguard/openstack-horizon-2026.1-fipspkg:bitnami/djangopkg:rpm/opensuse/python-Django&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/python-Django&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/python-Django4&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/python-Django5&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/python-Django6&distro=openSUSE%20Tumbleweedpkg:rpm/suse/python-Django&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP7
< 25.7.3_git20260806-r1+ 8 more
- (no CPE)range: < 25.7.3_git20260806-r1
- (no CPE)range: < 25.7.3_git20260806-r1
- (no CPE)range: >= 5.2.0, < 5.2.15
- (no CPE)range: < 5.2.4-bp160.9.1
- (no CPE)range: < 5.2.15-1.1
- (no CPE)range: < 4.2.30-3.1
- (no CPE)range: < 5.2.16-1.1
- (no CPE)range: < 6.0.6-1.1
- (no CPE)range: < 4.2.11-150600.3.59.1
Patches
Vulnerability mechanics
References
11- docs.djangoproject.com/en/dev/releases/security/nvdPatchVendor Advisory
- www.djangoproject.com/weblog/2026/jun/03/security-releases/nvdPatchVendor Advisory
- github.com/advisories/GHSA-8cjm-8mp7-r2xfghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-8404ghsaADVISORY
- docs.djangoproject.com/en/dev/releases/securityghsaWEB
- github.com/django/django/commit/366d9ae6e8d1469c04e9ebdc1bcd098fc14a3b1eghsaWEB
- github.com/django/django/commit/b4330259ffbe1a031ed14daab1f35697460f10f2ghsaWEB
- github.com/django/django/commit/d618d7ae4fec727d5b582bd24f803c28d17bf7cdghsaWEB
- github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-201.yamlghsaWEB
- groups.google.com/g/django-announcenvdRelease NotesWEB
- www.djangoproject.com/weblog/2026/jun/03/security-releasesghsaWEB
News mentions
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