{"id":"CVE-2026-96281","state":"PUBLISHED","title":"Flatpak: flatpak: unprivileged active user can bypass anti-downgrade checks for system apps/runtimes","description":"On a multi-user system, a user with an active local login session could downgrade a system-wide Flatpak app to an older version by removing the app's remote ref via the unprivileged system-helper RemoveLocalRef method, causing the anti-downgrade check to fail to find a reference date. 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