High7.3Apache Software Foundation

High [CVE-2026-23904] Apache Kyuubi: Kyuubi Engine UI proxy accepts a host and port from the request path and proxies HTTP requests to that destination

This high-severity Apache Software Foundation advisory covers CVE-2026-23904 affecting Apache Kyuubi.

CVE-2026-23904 Published Jul 29, 2026Updated by vendor Jul 30, 2026

CVE-2026-23904

Affected products & platforms

Apache Software FoundationUnclassified

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Summary

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.

Affected versions

1.8.0 through 1.12.0.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

1.12.0

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

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.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed for the summary, affected/fixed versions and remediation guidance it provides.
Apache Software Foundation
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-23904 instead of the raw feed document.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-23904NVD CVE.org MITRE

Official resources

ASF Security — reporting & CVE process
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Apache project downloads (fixed releases)
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