CVE-2026-23904 (CVSS 7.3)

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.

Is your site exposed to CVE-2026-23904?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.3

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploit Prediction

0.0031

Probability of exploitation

0.23%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-923 CWE-923

References

Other References

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

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 7.3 (HIGH).

How severe is CVE-2026-23904? +

CVE-2026-23904 has a CVSS v3.1 score of 7.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0031, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-23904? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-8920

Improper Restriction of Communication Channel to Intended Endpoints and External Control of File Name or Path in Aura Wallpaper Service …

CVE-2025-46566 9.8

DataEase is an open-source BI tool alternative to Tableau. Prior to version 2.10.9, authenticated users can complete RCE through the …

CVE-2024-41889 9.8

Multiple Pimax products accept WebSocket connections from unintended endpoints. If this vulnerability is exploited, arbitrary code may be executed by …

CVE-2023-28078 9.1

Dell OS10 Networking Switches running 10.5.2.x and above contain a vulnerability with zeroMQ when VLT is configured. A remote unauthenticated …

CVE-2025-48999 8.8

DataEase is an open source business intelligence and data visualization tool. A bypass of CVE-2025-46566's patch exists in versions prior …

CVE-2025-20261 8.8

A vulnerability in the SSH connection handling of Cisco Integrated Management Controller (IMC) for Cisco UCS B-Series, UCS C-Series, UCS …

CVE-2026-23904