{"schema_version": "1.6.1", "id": "CVE-2026-23904", "summary": "Unrestricted access via Kyuubi engine-ui proxy", "details": "Kyuubi 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 Kyuubi server to send HTTP requests to arbitrary reachable hosts, resulting in SSRF or open-proxy behavior.\n\n\nThis issue affects Apache Kyuubi: from 1.8.0 before 1.12.0.\n\nUsers are recommended to upgrade to version 1.12.0, which disables the proxy by default. To restore proxied Engine UI, set kyuubi.frontend.rest.engine.ui.proxy.enabled=true and configure allowed target hosts with kyuubi.frontend.rest.engine.ui.proxy.hosts.", "affected": [{"ranges": [{"type": "SEMVER", "events": [{"introduced": "1.8.0"}, {"fixed": "1.12.0"}]}]}], "references": [{"type": "WEB", "url": "https://github.com/apache/kyuubi/pull/7483"}, {"type": "WEB", "url": "https://lists.apache.org/thread/ps79fcfx49ox9kwgztc5t5bw0tyhck9m"}]}