Feature: Shared/private workflows and image boards in multiuser mode

[lstein]

Summary

This PR gives users the ability to share workflows and image boards when logged in to a multiuser instance.

Workflow Sharing

User can share workflows with each other as well as create private workflows that are invisible to other users. Each user has their own workflow library that is only accessible to them. Any workflow can be designated Shared, in which case it is readable by all users but only writable by the owner.

Backend

• Migration 28: Adds user_id (DEFAULT 'system') and is_public (DEFAULT FALSE) columns + indexes to workflow_library. Uses executescript() for the DDL statements so that transaction management is handled explicitly (executescript always issues COMMIT first), which avoids edge-cases in Python's sqlite3 implicit transaction handling for DDL on tables that contain VIRTUAL generated columns. A post-check raises a clear RuntimeError if the columns were not actually added, preventing silent failures. No cross-module imports in the migration callback.
• WORKFLOW_LIBRARY_DEFAULT_USER_ID constant added to workflow_records_common.py to avoid magic strings across service and base layers
• workflow_records_*: All query methods (create, get_many, counts_by_*, get_all_tags) accept user_id and is_public filters; new update_is_public() method — which also automatically adds the "shared" tag when is_public=true and removes it when is_public=false
• workflows.py router:
  • All endpoints now use CurrentUserOrDefault
  • list_workflows / counts_by_* / get_all_tags automatically scope user category results to the current user in multiuser mode (bypassed when is_public=true is explicitly requested)
  • Ownership enforced on GET (non-owner blocked unless public/default/admin), PATCH, DELETE, and thumbnail endpoints
  • New PATCH /api/v1/workflows/i/{workflow_id}/is_public endpoint

Frontend

• openapi.json updated; schema.ts regenerated via make frontend-typegen
• WorkflowRecordOrderBy gains is_public; WorkflowLibraryView gains 'shared'
• Shared Workflows nav section added to WorkflowLibrarySideNav; WorkflowList routes 'shared' view to is_public=true query
• WorkflowGeneralTab (Details panel): new ShareWorkflowCheckbox component positioned between the workflow Name field and the Workflow Thumbnail section — visible to the workflow owner and admins in multiuser mode; label and checkbox are on the same horizontal line; toggles is_public via the API
• WorkflowListItem: owners see a ShareWorkflowToggle switch; public workflows display a "Shared" badge; EditWorkflow and DeleteWorkflow buttons are now gated behind isOwner || is_admin so non-owners cannot edit or delete others' workflows
• SaveWorkflowAsDialog: "Share workflow" checkbox — marks new workflow public immediately after creation
• WorkflowSortControl + sort options updated to include is_public
• i18n: sharedWorkflows, shareWorkflow ("Shared workflow") added to en.json

Single-user mode behavior is completely unchanged — no workflow filtering is applied when multiuser is false.

QA Instructions

** Warning: ** be aware that this PR performs a database migration before testing.

Workflow Isolation

1. Run InvokeAI in multiuser mode multiuser: true and create two users: user1 and user2. If the user interface for managing users isn't yet merged in, use the invoke-useradd CLI.
2. Log in as user1 and create two workflows: user1 workflow shared and user1 workflow private
3. When you save the shared workflow, check the "shared workflow" box. Leave it unchecked for the private workflow.
4. Go to the workflow library. Confirm that you see both workflows in the "Your Workflows" section, and that "user1 workflow shared" bears the green "SHARED" emblem.
5. Now check the "Shared Workflows" section, and confirm that you see the shared workflow only.
6. Log out and log back in as user2
7. Open the workflow library and confirm that "user1 workflow shared" is present in the Shared Workflows section and that "Your Workflows" is empty.
8. Open "user 1 workflow shared" and confirm that you can edit it, but can't save it (you can "Save As" however).

---

Board Sharing

This PR implements image board sharing among users when multiuser mode is active. It adds three visibility levels for the boards:

• private -- This board is visible only to the current logged-in user (the default)
• shared -- This board is visible to all users on a read-only basis. Only the owner or administrator can modify its contents or delete the board.
• public -- This board is visible to all users and they have read/write/delete access to the images contained within it. Only the owner or administrator can rename, delete, or otherwise modify the board.

Summary

Backend

• BoardVisibility enum (private | shared | public) added to board_records_common.py; board_visibility field added to BoardRecord and BoardChanges
• Migration 29: adds board_visibility TEXT NOT NULL DEFAULT 'private' column to boards table; migrates existing is_public=1 rows to 'public'
• board_records_sqlite.py: update() handles board_visibility; get_many()/get_all() queries use board_visibility IN ('shared', 'public') instead of is_public = 1
• boards.py router: get_board and list_all_board_image_names allow non-owner access for shared/public boards; update_board and delete_board remain owner/admin-only

Frontend

• schema.ts: BoardVisibility enum, board_visibility field on BoardDTO and BoardChanges
• BoardContextMenu.tsx: "Set Private / Set Shared / Set Public" menu items (owner and admins only); visibility handlers extracted into named useCallback hooks to comply with react/jsx-no-bind; Delete Board, Archive, and Unarchive menu items are disabled (greyed out) for non-owners of shared and public boards
• BoardEditableTitle.tsx: pencil icon and double-click rename hidden for non-owners of shared and public boards
• GalleryBoard.tsx: blue share icon badge for shared boards, green globe badge for public boards; DnD drop target disabled for non-owners of shared boards
• GalleryImage.tsx: drag-out disabled for non-owners viewing a shared board, preventing images from being moved out
• GalleryItemDeleteIconButton.tsx: shift+hover trash icon hidden when viewing a shared board as a non-owner
• ContextMenuItemDeleteImage.tsx: delete image menu item hidden when viewing a shared board as a non-owner
• ContextMenuItemChangeBoard.tsx: "Change Board" menu item disabled when viewing a shared board as a non-owner
• MultipleSelectionMenuItems.tsx: "Change Board" and "Delete Selection" disabled when viewing a shared board as a non-owner
• InvokeQueueBackButton.tsx: main Invoke/generate button disabled when the auto-add board is a shared board the current user does not own
• FloatingLeftPanelButtons.tsx: floating invoke icon button also disabled when the auto-add board is a shared board the current user does not own
• ChangeBoardModal.tsx: destination board list filtered to exclude shared boards the current user does not own, preventing moves into read-only boards
• New hooks — useBoardAccess(board) returns { canWriteImages, canRenameBoard, canDeleteBoard }; useSelectedBoard() and useAutoAddBoard() look up the relevant BoardDTO from the RTK Query cache
• en.json: i18n strings for all new visibility UI

Tests

10 new tests in test_boards_multiuser.py covering default visibility, setting each level, cross-user access enforcement, reversion to private, non-owner restriction, and admin override.

QA Instructions

** Warning: ** be aware that this PR performs a database migration before testing.

1. Enable multiuser mode (multiuser: true in config)
2. Create a board as User A — verify it defaults to private (User B cannot see it)
3. Right-click board → Set Shared — verify User B can now view it but:
   • The pencil icon is hidden and double-clicking the name does nothing
   • The Delete Board, Archive, and Unarchive options in the context menu are greyed out
   • The trash icon on images and "Delete Image" context menu item are hidden
   • Both the main Invoke button and the floating invoke icon button are disabled if this shared board is the auto-add target
   • Dragging images onto the board is disabled
   • Dragging images out of the board is disabled
   • The "Change Board" destination list does not include this shared board
4. Set to Public — verify User B can view and write images (including generating into it), but cannot rename, delete, or archive the board
5. Set back to Private — verify User B loses access again
6. Verify shared/public boards show the appropriate icon badge in the boards list
7. Verify admins retain full access to all boards regardless of visibility

---

Additional Fixes in this PR

There are two small UI bugs that were found and fixed while working on this PR.

• The splash screens that the user sees at startup time have been customized such that non-admin users are not prompted to install models. Instead they are referred to the first administrator to install models and make other global settings.

• This PR also corrects a bug that allowed any user to run "sync models" and remove orphaned models. Only the administrator is allowed to do this.

QA

Splash Screens

To test, you should start with a fresh root directory that has no models.

1. Create the admin user and a non-admin user.
2. Log in as the admin user and confirm that the splash screen that says "start by installing models" is still there, and that when you try to select a model you see a similar message.
3. Log out and log in as the non-admin user. Now check the splash message. Instead of asking you to install a model, it instructs you to contact the administrator to install models. To avoid ambiguity, it gives the administrator's email address used at registration time.
4. There will be similar messages when you try to select a model, or when you go to the upscaling tab and necessary models are missing.

Sync Models button

Confirm that as a non-admin user, the Models page does not show the "Sync Models" button, and that this button reappears when logged in as an administrator.

Merge Plan

Migrations 28 and 29 add new columns to the boards and workflows tables with safe defaults so existing databases upgrade non-destructively. No redux slice changes.

Checklist

• The PR has a short but descriptive title, suitable for a changelog
• Tests added / updated (if applicable)
• ❗Changes to a redux slice have a corresponding migration
• Documentation added / updated (if applicable)
• Updated What's New copy (if doing a release after this PR)

[JPPhoto]

Some issues:

1. Shared-board write protection is still bypassable through direct API calls. The PR only adds read-side visibility checks in boards.py, but the actual mutation routes in board_images.py and images.py still have no CurrentUserOrDefault dependency and no owner/visibility checks. In practice, another user can list image names on a shared board via the new allowed GET /boards/{id}/image_names, then call DELETE /images/i/{image_name} or POST /board_images/ to delete/move images anyway. That defeats the PR's core "shared = read-only" guarantee. This needs API-level authorization tests around board-image mutation and image deletion/update, not just UI gating.

2. Private workflow thumbnails are still exposed despite the PR summary claiming thumbnail endpoint ownership enforcement. The write endpoints are guarded in the PR, but GET /api/v1/workflows/i/{workflow_id}/thumbnail in workflows.py still has no user context and no ownership/public check. If a workflow id is known, a private workflow's thumbnail remains fetchable even when GET /workflows/i/{workflow_id} is now correctly blocked.

3. The new admin_email field on unauthenticated setup status leaks administrator identity. The PR extends GET /api/v1/auth/status in auth.py to return the first active admin's email, and that route still has no auth requirement. On a public multiuser deployment, this becomes a trivial admin-enumeration/phishing aid. If the frontend needs this for onboarding copy, it should be limited to the setup_required=true path or otherwise gated/sanitized.

[lstein]

Fixed in 8182c08

Fix: private board image enumeration via generic listing endpoints

Vulnerability

GET /api/v1/images?board_id=... and GET /api/v1/images/names?board_id=... passed board_id directly to the SQL layer without checking board visibility. The SQL only applied user_id filtering for board_id="none" (uncategorized images), so any authenticated user who knew a private board ID could enumerate its images — even though GET /api/v1/boards/{board_id} and GET /api/v1/boards/{board_id}/image_names correctly enforced visibility.

Fix

Both list_image_dtos() and get_image_names() in invokeai/app/api/routers/images.py now call _assert_board_read_access(board_id, current_user) before querying when board_id is a real board ID (not None or "none"). Returns 403 unless the caller is the board owner, an admin, or the board is Shared/Public.

Tests (6 new)

Test	Asserts
test_list_images_private_board_rejected_for_non_owner	GET /images?board_id=... returns 403 for non-owner
test_list_images_shared_board_allowed_for_non_owner	GET /images?board_id=... returns 200 for shared board
test_get_image_names_private_board_rejected_for_non_owner	GET /images/names?board_id=... returns 403 for non-owner
test_get_image_names_shared_board_allowed_for_non_owner	GET /images/names?board_id=... returns 200 for shared board
test_list_images_own_private_board_allowed	Owner can list own private board (200)
test_admin_can_list_images_on_any_board	Admin can list any board (200)

[lstein]

Fixed in 345d039.

Fix: privilege escalation via image-to-board reassignment

Vulnerability

add_image_to_board() and add_images_to_board() only checked write access to the destination board, never verifying that the caller owned the source image. This enabled a privilege escalation attack:

1. Attacker calls POST /board_images/ { board_id: attacker-board, image_name: victim-image }
2. Board write access passes — attacker owns the destination board
3. Image is reassigned to attacker's board (upsert replaces old board association)
4. _assert_image_owner() in images.py treats board ownership as sufficient authority
5. Attacker can now delete, patch, star, or unstar the victim's image through normal image mutation routes

Fix

Added _assert_image_direct_owner() to board_images.py — intentionally stricter than _assert_image_owner() in images.py. It requires direct image ownership (image_records.user_id) or admin. Board ownership is explicitly not sufficient, breaking the escalation chain.

Both add_image_to_board and add_images_to_board (batch) now call this check before allowing the operation.

Also fixed a pre-existing bug where HTTPException raised inside the batch loop was caught by the outer except Exception and returned as 500 instead of propagating the correct status code.

Tests (2 new, 2 updated)

Test	Asserts
test_non_owner_cannot_add_other_users_image_to_own_board	New — attacker adding victim's image to own board gets 403
test_non_owner_cannot_batch_add_other_users_images_to_own_board	New — same attack via batch endpoint gets 403
test_admin_can_add_image_to_any_board	Updated — now creates a real image record so the ownership check passes
test_owner_can_add_image_to_own_board	Updated — same

[lstein]

Fixed in 9e7354d.

Fix: unauthorized image access via recall parameter resolution

Vulnerability

POST /api/v1/recall/{queue_id} loaded image files and ran ControlNet preprocessors on any image_name supplied in control_layers or ip_adapters without checking that the caller could read the image. Two information leaks:

1. Dimension extraction: load_image_file() at recall_parameters.py:138-166 opens any image by name and returns { image_name, width, height } — no access check.
2. Derived image minting: The ControlNet branch at recall_parameters.py:228 calls process_controlnet_image(), which builds an invocation around the attacker-supplied image (controlnet_processor.py:121-166) and returns a new processed image token plus dimensions. The attacker can then fetch this derived image by its returned name.

An attacker who knows another user's image UUID (e.g., from a previously-shared board) could exploit both paths.

Fix

Added _assert_recall_image_access() in recall_parameters.py which validates read access for every image referenced in the request before any resolution or processing occurs. Access is granted when:

• The caller is an admin
• The caller is the image's direct owner (image_records.user_id)
• The image sits on a Shared or Public board

The check runs before the try block so the HTTPException propagates correctly (not caught as 500).

Tests (5 new)

Test	Asserts
test_recall_controlnet_with_other_users_image_rejected	ControlNet with victim's private image → 403
test_recall_ip_adapter_with_other_users_image_rejected	IP adapter with victim's private image → 403
test_recall_own_image_allowed	Owner can reference own image (not 403)
test_recall_shared_board_image_allowed	Image on shared board usable by other users (not 403)
test_recall_admin_can_reference_any_image	Admin can reference any image (not 403)

[lstein]

Fixed in a6308b4.

Fix: unauthenticated model install job endpoints

Vulnerability

Six model install job endpoints were missing authentication, even though the neighboring cancel and prune routes correctly required AdminUserOrDefault:

Endpoint	Method	Risk
/api/v2/models/install	GET	Exposes source, local_path, download_parts, error, error_traceback
/api/v2/models/install/{id}	GET	Same sensitive fields for a specific job
/api/v2/models/install/{id}/pause	POST	Mutating — pauses installation
/api/v2/models/install/{id}/resume	POST	Mutating — resumes installation
/api/v2/models/install/{id}/restart_failed	POST	Mutating — restarts failed downloads
/api/v2/models/install/{id}/restart_file	POST	Mutating — restarts a specific file download

Any caller who could reach the API could view sensitive model installation details and interfere with installation state.

Fix

All six endpoints now require AdminUserOrDefault, consistent with the existing cancel_model_install_job and prune_model_install_jobs routes. Model installation is an admin operation.

Tests (8 new)

Test	Asserts
test_list_model_installs_requires_auth	GET /install without token → 401
test_get_model_install_job_requires_auth	GET /install/{id} without token → 401
test_pause_model_install_requires_auth	POST /install/{id}/pause without token → 401
test_resume_model_install_requires_auth	POST /install/{id}/resume without token → 401
test_restart_failed_model_install_requires_auth	POST /install/{id}/restart_failed without token → 401
test_restart_model_install_file_requires_auth	POST /install/{id}/restart_file without token → 401
test_non_admin_cannot_list_model_installs	Non-admin user → 403
test_non_admin_cannot_pause_model_install	Non-admin user → 403

[lstein]

I think we discussed this and how we were willing to live with this, but non-admin users can still enumerate the global queue as a redacted activity feed....

I'm willing to live with the current level of partial redaction. I work on large academic compute clusters, and I'm used to the queue manager listing user names, what nodes their tasks are executing on, and the name of the task. Labs can be pretty competitive with each other, but nobody seems to mind this level of information leakage.

I think this will only become a problem for InvokeAI when it is mounted as a hosted solution, in which case users might not want their competitors looking over their shoulders. For the time being, I'd like to present enough information that a user can see how many jobs are in the queue in front of theirs and possibly complain to the admin when someone is hogging the system.

[JPPhoto]

Bulk download cross-user exfiltration fix + pre-existing toast race condition

There's still a problem with bulk downloads. The chain is:

1. Bulk download ownership is tracked but not enforced on fetch.
   In images.py, get_bulk_download_item() takes only bulk_download_item_name and does not accept CurrentUserOrDefault. It calls bulk_download.get_path(...) and serves the file if it exists.
   In bulk_download_default.py, the service stores _download_owners.
   In bulk_download_default.py, there is a get_owner() helper.
   I do not see get_owner() used by images.py or anywhere else on the fetch path.

2. The websocket event still exposes the capability token.
   In events_common.py, BulkDownloadEventBase includes bulk_download_item_name.
   In sockets.py, _handle_bulk_image_download_event() emits the event payload to room=event_data.bulk_download_id.

3. That room is still shared.
   In bulk_download_common.py, DEFAULT_BULK_DOWNLOAD_ID = "default".
   In bulk_download_default.py, every job uses bulk_download_id = DEFAULT_BULK_DOWNLOAD_ID.

4. Any authenticated socket can subscribe to that shared room.
   In sockets.py, _handle_sub_bulk_download() only checks that the socket is authenticated in multiuser mode, then joins BulkDownloadSubscriptionEvent(**data).bulk_download_id.
   There is no ownership check on the requested bulk download room.

So the code path is still:

• user A starts a download
• event containing bulk_download_item_name is emitted to shared room default
• user B, if authenticated and subscribed to default, receives that token
• user B calls the unauthenticated fetch route before deletion

Hope this analysis helps.

[JPPhoto]

Plus...

GET /api/v1/boards/none/image_names still leaks every uncategorized image name across users. In boards.py, list_all_board_image_names() skips authorization entirely when board_id == "none". It then calls the storage method in board_image_records_sqlite.py, which resolves "none" to board_images.board_id IS NULL with no images.user_id filter. That means any authenticated user can enumerate all uncategorized image UUIDs on the instance. Because the binary image routes are still intentionally unauthenticated in images.py and images.py, this is a still a real cross-user image disclosure path.

Public-board write semantics are still not implemented on the backend. The PR description says public boards should allow all users to read, write, and delete contained images, but the router checks still require owner or admin. In board_images.py, _assert_board_write_access() only allows the board owner or an admin. That blocks non-owners from adding or removing images through board_images.py and board_images.py. Uploads are also owner-only in images.py, and image mutation authority still ignores BoardVisibility.Public in images.py. Thus, public boards are readable to everyone, but not actually writable or deletable by everyone through these API paths.

[JPPhoto]

Feel free to apply this git patch to expose the flaws.
pr-9018-adversarial-tests.patch

[lstein]

Any authenticated socket can subscribe to that shared room.
In sockets.py, _handle_sub_bulk_download() only checks that the socket is authenticated in multiuser mode, then joins BulkDownloadSubscriptionEvent(**data).bulk_download_id.
There is no ownership check on the requested bulk download room.

My mistake. I was trying to fix a race condition that prevented the "downloads are ready" toast from popping up and made the private websocket room public while debugging.

Issues addressed in 58cb8aa

Fix: close bulk download exfiltration path

Bulk download capability token exfiltration

Bulk download flow still leaks the zip filename (capability token) to other users:

1. User A starts a download
2. bulk_download_complete event (containing bulk_download_item_name) is emitted to shared room "default"
3. User B, subscribed to "default", receives the token
4. User B calls the unauthenticated GET /download/{name} before the file is deleted

Fixes (3 layers):

Layer	Before	After
Socket event routing	Emitted to shared "default" room	Emitted to user:{user_id} + admin rooms only
GET endpoint auth	Unauthenticated	Requires CurrentUserOrDefault + ownership check via get_owner()
Frontend download	<a download> (no auth headers)	fetch() with Authorization: Bearer header + programmatic blob download

Additional fixes from @JPPhoto 's tests (thanks!)

Public board write access (board_images.py, images.py):

• _assert_board_write_access() now grants access when board_visibility == Public (public boards accept contributions from any authenticated user)
• _assert_image_owner() now grants mutation rights when the image sits on a Public board

Uncategorized image enumeration (boards.py):

• GET /boards/none/image_names now filters to the caller's own images (non-admin), preventing cross-user enumeration of uncategorized images

board_images router resilience (board_images.py):

• Replaced images.get_dto(image_name).board_id with board_image_records.get_board_for_image(image_name) to determine old board association — avoids dependency on image_files service

[JPPhoto]

Public-board write semantics are still incomplete for uploads. In invokeai/app/api/routers/images.py, upload_image() still blocks any non-admin caller when board_id is set and board.user_id != current_user.user_id. That means a non-owner still cannot upload directly into a public board through /api/v1/images/upload, even though the PR description says public boards allow all users to read, write, and delete contained images. The later fixes in invokeai/app/api/routers/board_images.py and _assert_image_owner() in invokeai/app/api/routers/images.py do cover moving existing images into public boards and mutating images already on public boards, but this upload path remains owner-only. This needs a test and then fixing and I hope that's it!

[lstein]

Public-board write semantics are still incomplete for uploads. In invokeai/app/api/routers/images.py,

Fixed in c19f040

[JPPhoto]

I think this is all good. I'll try testing it out manually today.

[JPPhoto]

I was able to do some minimal testing on a live system here and it looks good. Would love to see an announcement and more community testing of this feature after it gets merged.