{
"id": "GHSA-8cjm-8mp7-r2xf",
"aliases": [
"CVE-2026-8404"
],
"details": "An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.\n`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.\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\nDjango would like to thank Ahmed Badawe for reporting this issue.",
"summary": "Django: UpdateCacheMiddleware may disclose cached responses due to case-sensitive Cache-Control handling",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.2.15"
}
]
}
],
"package": {
"name": "django",
"ecosystem": "PyPI"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "6.0.6"
}
]
}
],
"package": {
"name": "django",
"ecosystem": "PyPI"
}
}
],
"modified": "2026-08-07T20:03:57Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
}
],
"published": "2026-06-03T15:30:43Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8404",
"type": "ADVISORY"
},
{
"url": "https://github.com/django/django/commit/366d9ae6e8d1469c04e9ebdc1bcd098fc14a3b1e",
"type": "WEB"
},
{
"url": "https://github.com/django/django/commit/b4330259ffbe1a031ed14daab1f35697460f10f2",
"type": "WEB"
},
{
"url": "https://github.com/django/django/commit/d618d7ae4fec727d5b582bd24f803c28d17bf7cd",
"type": "WEB"
},
{
"url": "https://docs.djangoproject.com/en/dev/releases/security",
"type": "WEB"
},
{
"url": "https://github.com/django/django",
"type": "PACKAGE"
},
{
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-201.yaml",
"type": "WEB"
},
{
"url": "https://groups.google.com/g/django-announce",
"type": "WEB"
},
{
"url": "https://www.djangoproject.com/weblog/2026/jun/03/security-releases",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-178"
],
"severity": "LOW",
"github_reviewed": true,
"nvd_published_at": "2026-06-03T14:16:47Z",
"github_reviewed_at": "2026-08-07T20:03:57Z"
}
}