CVE-2026-44553
HighSummary
Open WebUI is an offline AI platform that prior to version 0.9.0 did not update the session pool after administrative role changes and user deletions. A user whose admin role was revoked retained admin privileges within their existing Socket.IO session as long as they kept the connection alive.
Risk Assessment
The organization may be exposed to unauthorized access to administrative functions by users who have had their privileges revoked, potentially leading to serious security breaches.
Recommendation
It is recommended to update Open WebUI to version 0.9.0 or later to eliminate this vulnerability and ensure that administrative role changes are properly enforced.
Original NVD description (English source)
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, administrative role changes and user deletions do not iterate SESSION_POOL to disconnect affected sessions. As a result, a user whose admin role has been revoked retains admin privileges within their existing Socket.IO session for as long as they keep the connection alive (via automatic heartbeats). The gap is exclusive to the Socket.IO session cache. This vulnerability is fixed in 0.9.0.