CVE-2026-57856

Cockpit CMS exposes a path traversal in the Bucket file storage API (/system/buckets/api). The api() function sanitizes the bucket name with a regex that still allows ".." and "../" sequences, which are then interpolated into uploads://buckets/{bucket} and not blocked by Flysystem’s WhitespacePat...

CVE-2026-57856

Cockpit CMS contains a path traversal vulnerability in the Bucket file storage API /system/buckets/api. The api method in modules/System/Controller/Buckets.php sanitizes the bucket name with pregreplace'/^a-zA-Z0-9-\./','', $bucket, which permits '..' and '../' sequences. The sanitized value is...