# CVE-2026-23904

## Summary

- **CVE ID:** CVE-2026-23904
- **Severity:** HIGH
- **CVSS Score:** 7.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
- **CWE:** CWE-923
- **Published:** Jul 29, 2026
- **Last Modified:** Jul 29, 2026

## Description

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 Products

- Apache Software Foundation — Apache Kyuubi (1.8.0)

## References

- [CNA](https://github.com/apache/kyuubi/pull/7483)
- [CNA](https://lists.apache.org/thread/ps79fcfx49ox9kwgztc5t5bw0tyhck9m)
- [CVE](http://www.openwall.com/lists/oss-security/2026/07/29/3)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.52%
- **EPSS Percentile:** 42.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._