A gallery root could be set to '/' (or 'C:\') through POST
/prompt_manager/settings because the deny list only matched a few
system prefixes. The root was persisted to config.json and fed into the
image-serving containment check, which then allowed any file on disk to
be read through /prompt_manager/images/serve/.
- GalleryConfig.validate_gallery_root() accepts a directory only when its
realpath lies inside a ComfyUI directory (folder_paths output/input/
temp/user) or a directory listed in PROMPT_MANAGER_EXTRA_GALLERY_ROOTS;
filesystem roots, the home directory, files and missing paths are
rejected.
- save_settings returns 400 and persists nothing when any root fails.
- _get_all_output_dirs() filters configured roots through the validator
and never falls back to a rejected root.
- PROMPT_MANAGER_CONFIG_PATH relocates config.json; load/save default
to it.
