---
id: CVE-2026-64959
title: 'Apache Kylin: Missing authentication on certain cache API endpoints'
summary: "Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'), Missing Authentication for Critical Function vulnerability in Apache Kylin.\_Impact most to the kylin services that are directly exposed to public netwo…"
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: adp
cwe:
  - CWE-89
  - CWE-306
vendor: Apache Software Foundation
product: Apache Kylin
affected:
  - apache_kylin >= 5.0.0 <= 5.0.4
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-20T15:18:29.876060Z'
published: '2026-10-16'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T15:18:33.054Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-64959'
references:
  - url: 'https://lists.apache.org/thread.html/oho4tw8kvxkybwpjykzl49zx6o17tkdt'
tags:
  - cve.org
epss: 0.00416
epssPercentile: 0.3575
ingestedAt: '2026-10-16T13:06:42.680Z'
---

## Overview

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'), Missing Authentication for Critical Function vulnerability in Apache Kylin. Impact most to the kylin services that are directly exposed to public network, which is not common. In-house kylin deployments are mostly not impacted.



This issue affects Apache Kylin: from 5 through 5.0.4. Certain backend cache API misses required authentication and can cause execution of injected SQL.



Users are recommended to upgrade to version 5.0.5, which fixes the issue.

## Affected

- `apache_kylin >= 5.0.0 <= 5.0.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.