Potential exposure of private data via case-sensitive Cache-Control directives in...

3.1 / 10

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

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.

Basic Information

ID CVE-2026-8404

Source DSF

Published Jun 3, 2026 at 13:16

Affected Product

Vendor djangoproject

Product Django

Version 6.0

Affected Versions djangoproject Django 6.0
djangoproject Django 5.2

CWE Classification

CWE-178

References

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    "lastseen": "",
    "description": "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.",
    "published": "2026-06-03T13:16:29.593Z",
    "modified": "2026-06-03T13:16:29.593Z",
    "type": "cve",
    "title": "Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCacheMiddleware",
    "source": "DSF",
    "references": "https://docs.djangoproject.com/en/dev/releases/security/\nhttps://groups.google.com/g/django-announce\nhttps://www.djangoproject.com/weblog/2026/jun/03/security-releases/",
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    "sourceData": "djangoproject Django 6.0\ndjangoproject Django 5.2",
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    "cvss": {
        "score": 3.1,
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        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N",
        "version": "3.1"
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Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCacheMiddleware_CVE-2026-8404