EUVD-2026-116021

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.cachepage decorator generate identical cache keys for requests that omit a header listed in the response’s Vary...