Vulnerability Details CVE-2026-23904
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.
This issue affects Apache Kyuubi: from 1.8.0 before 1.12.0.
Users 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 23.2%
CVSS Severity
CVSS v3 Score 7.3
References
Products affected by CVE-2026-23904
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cpe:2.3:a:apache:kyuubi:1.10.0
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cpe:2.3:a:apache:kyuubi:1.10.1
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cpe:2.3:a:apache:kyuubi:1.10.2
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cpe:2.3:a:apache:kyuubi:1.10.3
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cpe:2.3:a:apache:kyuubi:1.11.0
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cpe:2.3:a:apache:kyuubi:1.11.1
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cpe:2.3:a:apache:kyuubi:1.8.0
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cpe:2.3:a:apache:kyuubi:1.8.1
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cpe:2.3:a:apache:kyuubi:1.8.2
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cpe:2.3:a:apache:kyuubi:1.8.3
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cpe:2.3:a:apache:kyuubi:1.9.0
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cpe:2.3:a:apache:kyuubi:1.9.1
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cpe:2.3:a:apache:kyuubi:1.9.2
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cpe:2.3:a:apache:kyuubi:1.9.3
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cpe:2.3:a:apache:kyuubi:1.9.4