PYSEC-2026-3638 Open WebUI: A folder write-collaborator can permanently delete the owner's chats by deleting a shared subfolder

Summary A user granted write access to a shared chat folder could permanently delete chats and messages belonging to the folder's owner. Deleting a folder cascades into the owner's chats and the entire subfolder subtree, and the deletion handler required only write access on subfolders instead of...

GHSA-3CG5-48J3-V4GV Open WebUI: A folder write-collaborator can permanently delete the owner's chats by deleting a shared subfolder

Summary A user granted write access to a shared chat folder could permanently delete chats and messages belonging to the folder's owner. Deleting a folder cascades into the owner's chats and the entire subfolder subtree, and the deletion handler required only write access on subfolders instead of...

CVE-2026-70494

Open WebUI vulnerability CVE-2026-70494 affects versions 0.10.0–0.11.0 where the DELETE /api/v1/folders/{id} handler allowed a collaborator with write access to a shared folder to permanently delete chats/messages of the folder owner. The issue arises because the subfolder check accepted any inhe...