CVE-2026-70483 — Open WebUI: Any authenticated user can cancel another user's chat generation via the chat delete endpoint
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, DELETE /api/v1/chats/{id} cancelled a chat's in-flight tasks befor…
Published: 2026-08-04 · CVSS: 3.1 · CVSS 3.1
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, DELETE /api/v1/chats/{id} cancelled a chat's in-flight tasks before checking whether the caller could delete that chat. Any authenticated user who knew another user's chat id could abort that user's running model response, title generation, or tag generation, even though the delete was refused and no chat data was deleted, modified, or disclosed. This issue is fixed in 0.11.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7