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CVE PROGRAM SOURCE RECORD2.3 Low

CVE-2026-35193

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

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

djangoproject Django

Default version status: unaffected

  • 6.0 to < 6.0.6affected
  • 6.0.6unaffected
  • 5.2 to < 5.2.15affected
  • 5.2.15unaffected

References