Critical severity · published Oct 16, 2026
CVE-2026-64959
Apache Kylin: Missing authentication on certain cache API endpoints
9.8
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AK
Apache Kylin · Apache Software Foundation
5.0.0 through 5.0.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64959
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-64959
lists.apache.org
https://lists.apache.org/thread.html/oho4tw8kvxkybwpjykzl49zx6o17tkdt
www.openwall.com
http://www.openwall.com/lists/oss-security/2026/10/16/4
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