Vulnerability in Apache (CVE-2026-23904)
Summary
Vulnerability in Apache (CVE-2026-23904). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the 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.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-23904 has been found in Apache.
Risk of unauthorized operations or information disclosure. CVSS score: 7.3/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Apache CVE-2026-23904" on the vendor's site.
CVE-2026-23904 (Apache) — CWE-923 / CVSS v3 7.3
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Workaround: set kyuubi.frontend.rest.engine.ui.proxy.: enabled
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-923) exists in Apache.
Check the vendor advisory for the affected versions of Apache.
Severity: High (CVSS 7.3/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Workaround: set kyuubi.frontend.rest.engine.ui.proxy.: enabled
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Apache' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'Apache' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
Apacheを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
set kyuubi.frontend.rest.engine.ui.proxy.: enabledパッチが適用されるまでの応急処置として、set kyuubi.frontend.rest.engine.ui.proxy.: enabled を実施。回避策の副作用 (機能低下) を確認した上で。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- advisory openwall.com
- patch security@apache.org
- patch security@apache.org
- web nvd.nist.gov
- web github.com