CVE-2026-84374 Laravel Excel writes exports outside the configured filesystem disk when given a caller-controlled path

Laravel Excel provides supercharged Excel exports and imports in Laravel. From 3.1.8 until 3.1.70, in src/Files/Disk.php the Maatwebsite\Excel\Files\Disk::copy method resolves the caller-controlled $destination supplied through Excel::store, $export-store, or storeExcel against the process workin...