CVE-2026-113593

LOW 3.1

Potential exposure of private data via empty and missing Vary headers

CVSS Score

3.1

EPSS Score

0.0%

EPSS Percentile

0th

An issue was discovered in Django 6.1 before 6.1.3, 6.0 before 6.0.10, and 5.2 before 5.2.19. The `django.middleware.cache.UpdateCacheMiddleware` and the `django.views.decorators.cache.cache_page()` decorator generate identical cache keys for requests that omit a header listed in the response’s `Vary` header and requests that include that header with an empty value, potentially allowing remote attackers to access private data cached for another request. Earlier, unsupported Django series (such as 5.1.x, 5.0.x, and 4.2.x) were not evaluated and may also be affected. Django would like to thank Andrew Gonzalez for reporting this issue.

CWE	CWE-524
Vendor	djangoproject
Product	django
Published	Nov 3, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

djangoproject / Django

6.1 < 6.1.3 6.0 < 6.0.10 5.2 < 5.2.19

References

NVD ↗ CVE.org ↗ EPSS Data ↗

docs.djangoproject.com: https://docs.djangoproject.com/en/dev/releases/security/ groups.google.com: https://groups.google.com/g/django-announce github.com: https://github.com/django/django/commit/c0b7e5e4e4546e8ddc58262f1945938bb9d9ac2d github.com: https://github.com/django/django/commit/55e2e009b4f3996e5c55af7b22a8c41eb826e892 github.com: https://github.com/django/django/commit/2006a2b068766bf332f1afcc32b7614d8e5759a2 github.com: https://github.com/django/django/commit/9007fecd3633cfd90b093ebe106af564347c8aee djangoproject.com: https://www.djangoproject.com/weblog/2026/nov/03/security-releases/

Credits

🔍 Andrew Gonzalez Andrew Gonzalez Jake Howard Sarah Boyce Jacob Walls