CVE-2026-23904
HighCVSS 7.3Exploitation Probability (EPSS)
Low risk48th percentile - higher than 48% of all known CVEs
Summary
Kyuubi Engine UI proxy accepts a host and port from the request path and proxies HTTP requests to that destination. A remote attacker with network access can cause SSRF or open-proxy behavior.
Risk Assessment
The organization is at risk of the Kyuubi server being used as a proxy to attack internal systems or external targets, potentially leading to data leaks or further breaches.
Recommendation
Upgrade Apache Kyuubi to version 1.12.0, which disables the proxy by default. If needed, configure allowed target hosts.
Other vulnerabilities in Apache Kyuubi
See all- CVE-2025-66518High
Any client with access to Apache Kyuubi Server via Kyuubi frontend protocols can bypass the server-side config kyuubi.session.local.dir.allow.list and use local files not listed in the config. This issue affects Apache Kyuubi from 1.6.0 through 1.10.2.
- CVE-2026-52680Critical
Apache Kyuubi versions 1.7.0 through 1.11.1 are vulnerable to path traversal during REST batch multipart upload handling. An attacker can provide path traversal sequences in the filename, allowing content to be written outside the intended directory.
- CVE-2026-62391High
The security fix for CVE-2025-66518 in Apache Kyuubi is incomplete. Any client with access to the Kyuubi server via frontend protocols can bypass the server-side config kyuubi.session.local.dir.allowlist using unprefixed Spark config aliases. This affects versions from 1.6.0 before 1.12.0.
Original NVD description (English source)
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.