CVE-2026-44552 Open WebUI: Redis Cache Keys tool_servers and terminal_servers Missing Instance Prefix Enable Cross-Instance Cache Poisoning

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the toolservers and terminalservers keys in utils/tools.py do use a prefix. When two or more Open WebUI instances share a Redis database a supported and documented deployment pattern...

PT-2026-39269

Name of the Vulnerable Software and Affected Versions Open WebUI versions prior to 0.9.0 Description Open WebUI fails to apply the REDIS KEY PREFIX to the tool servers and terminal servers keys within the utils/tools.py file. In deployments where multiple instances share a single Redis...