CVE-2026-23904

Name of the Vulnerable Software and Affected Versions Apache Kyuubi versions 1.8.0 through 1.11.x

Description The Engine UI proxy accepts a host and port from the request path and proxies HTTP requests to that destination. A remote requester with network access to the proxy can cause the server to send HTTP requests to arbitrary reachable hosts, leading to Server-Side Request Forgery (SSRF), where the server is tricked into making requests to internal or external resources, or open-proxy behavior.

Recommendations Upgrade to version 1.12.0. To restore proxied Engine UI after upgrading, set kyuubi.frontend.rest.engine.ui.proxy.enabled to true and configure allowed target hosts using kyuubi.frontend.rest.engine.ui.proxy.hosts.