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CVE-2026-64959: Apache Kylin: Missing authentication on certain cache API endpoints

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-16 · updated 2026-10-20
• Weakness: CWE-89

Description

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 products

• Apache Software Foundation Apache Kylin: from 5.0.0 through 5.0.4

References

• https://lists.apache.org/thread.html/oho4tw8kvxkybwpjykzl49zx6o17tkdt
• http://www.openwall.com/lists/oss-security/2026/10/16/4

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