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.

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History

Fri, 05 Jun 2026 13:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*

Thu, 04 Jun 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Low


Wed, 03 Jun 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 03 Jun 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Djangoproject
Djangoproject django
Vendors & Products Djangoproject
Djangoproject django

Wed, 03 Jun 2026 14:15:00 +0000

Type Values Removed Values Added
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 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.
Title Potential exposure of private data via missing Vary: Authorization in UpdateCacheMiddleware
Weaknesses CWE-524
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 2.3, 'vector': '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'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: DSF

Published:

Updated: 2026-06-03T15:47:18.140Z

Reserved: 2026-04-01T18:21:23.779Z

Link: CVE-2026-35193

cve-icon Vulnrichment

Updated: 2026-06-03T15:47:14.925Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-03T14:16:41.247

Modified: 2026-06-05T13:03:52.383

Link: CVE-2026-35193

cve-icon Redhat

Severity : Low

Publid Date: 2026-06-03T13:16:38Z

Links: CVE-2026-35193 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-03T15:30:26Z

Weaknesses