CVE-2026-35193

LOW 3.1

Potential exposure of private data via missing Vary: Authorization in UpdateCacheMiddleware

CVSS Score

3.1

EPSS Score

0.0%

EPSS Percentile

0th

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 add `Authorization` to the `Vary` response header for requests bearing that header without `Cache-Control: public`, which allows remote attackers to read private cached responses via unauthenticated requests to the same URL. 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 Shai Berger for reporting this issue.

CWE	CWE-524
Vendor	djangoproject
Product	django
Published	Jun 3, 2026
Last Updated	Jun 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

6.0 < 6.0.6 5.2 < 5.2.15

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 djangoproject.com: https://www.djangoproject.com/weblog/2026/jun/03/security-releases/

Credits

🔍 Shai Berger Jacob Walls Natalia Bidart