has_access_to_file() derives file access from the objects a file is attached to
(knowledge bases, workspace models). Those branches returned True for any access_type
whenever the user held that permission on the object, write/delete included. Since a
user can create their own KB or model and attach any file they can merely READ (KB
attach and the model meta.knowledge validator both gate on read access only), a user
with read access to a victim file could launder it into write/delete: attach it to an
object they own, then rename, overwrite or delete it via the write-gated file routes
(POST /files/{id}/rename, /data/content/update, DELETE /files/{id}). This is the
residual of GHSA-vjqm-6gcc-62cr (CVE-2026-54012) left open by the read-only attach
validator (CWE-863).
An object now confers write/delete on a file only when the object's owner owns that
file, so delegation originates from the file's own owner. Read is unchanged (RAG and
shared-object reads still work), and legitimate delegation is preserved: a write grant
on an object whose owner owns the attached file still confers write. Applied to all
three object branches: knowledge base, file home collection, and workspace model.
Co-authored-by: rexpository <30176934+rexpository@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The direct image-edit route was the only image-edit surface with no authorization: it ran
on get_verified_user alone, while POST /generations enforces ENABLE_IMAGE_GENERATION +
features.image_generation and the built-in edit_image tool enforces ENABLE_IMAGE_EDIT +
features.image_generation. A verified non-admin user could therefore reach the configured
image-edit provider (spending IMAGES_EDIT_OPENAI_API_KEY) even when the administrator had
globally disabled image editing (ENABLE_IMAGE_EDIT=False) or denied the user image
generation.
Split the route from the shared impl (mirroring generate_images/image_generations): the new
/edit wrapper enforces ENABLE_IMAGE_EDIT and the per-user image-generation permission, then
delegates to image_edits(). The internal callers (the edit_image tool and the chat
middleware) already gate themselves and call image_edits() directly, so they are unaffected.
Co-authored-by: jagstack <52110932+jagstack@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Adds a 'Reset to Defaults' button to both the Edit Default Permissions
modal and the Edit User Group permissions modal.
- Default permissions modal: resets to stock/env-var configuration
- User group modal: resets to current global default permissions
Backend: new GET /api/v1/users/default/permissions/defaults endpoint
that returns DEFAULT_USER_PERMISSIONS (env-var-based initial defaults).
ws_terminal() interpolated the path parameter session_id directly into the upstream
terminal WebSocket URL and then appended ?user_id=<caller>, with no encoding or
validation (the HTTP sibling proxy_terminal runs _sanitize_proxy_path; this path ran
nothing). An encoded '?'/'&' smuggled through session_id survives Open WebUI's single
decode and is re-decoded by the upstream, injecting an attacker-chosen user_id ahead
of the appended one. Query parsing binds the first occurrence, so the orchestrator
resolves the spoofed user's terminal scope, letting a normal authenticated user
present another user's identity to the upstream (CWE-116/863).
Encode session_id as an opaque path segment with urllib.parse.quote(session_id,
safe=''). This neutralises '?'/'#'/'&' at any decode depth (the upstream's single
decode reverses only the quote, leaving the original delimiters inert as path
content), while legitimate UUID session ids pass through unchanged. The appended
user_id is then the only query parameter the upstream binds.
The separate concern that the forwarded identity is a bearer claim with no integrity
binding spans Open WebUI and the upstream terminal server and is not addressed here.
Co-authored-by: rexpository <30176934+rexpository@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
