CVE-2026-44564
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
15/05/2026
Last modified:
18/05/2026
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the ydoc:document:update Socket.IO event handler checks whether the sender is a member of the document's Socket.IO room (line 678) but does not verify that the sender has write permission. Users with read-only access join the document room via ydoc:document:join, which only requires read permission (line 520). Once in the room, the user can emit ydoc:document:update events that modify the in-memory Yjs document state and are broadcast to all other collaborators in real time. This vulnerability is fixed in 0.9.0.
Impact
Base Score 3.x
5.40
Severity 3.x
MEDIUM