# CVE-2026-64959: Apache Kylin SQL injection and missing authentication in cache API

Source: https://junglewise.ai/threats/cve-2026-64959-improper-neutralization-of-special-elements-used-in-an-sql  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-16. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-64959 · Severity: info · Published 2026-10-16

Apache Kylin is a data analytics platform that exposes backend APIs for caching purposes. Certain cache API endpoints lack required authentication and are vulnerable to SQL injection, allowing an unauthenticated attacker to execute arbitrary SQL commands. This vulnerability primarily affects Kylin instances directly exposed to public networks, which is uncommon; most internal deployments are not at risk.

Technologies: [Apache Kylin](https://junglewise.ai/threats/technologies/kylin). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache).

## Quick answers

**Is CVE-2026-64959 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-64959 being exploited in the wild.

**How severe is CVE-2026-64959?** Informational severity, published 16 October 2026.

**Which products and versions are affected?** Apache Kylin 5.0.0 through 5.0.4.

**Is there a fix for CVE-2026-64959?** Yes: fixed in 5.0.5. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-64959 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-64959?** Check whether you run Apache Kylin at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 5.0.5

## Technical details

The vulnerability is a combination of missing authentication on critical cache API endpoints and SQL injection via those endpoints. An unauthenticated network attacker can craft malicious SQL and inject it through the unprotected API to execute arbitrary queries against the backend database. The issue affects Apache Kylin versions 5.0.0 through 5.0.4 and is resolved in 5.0.5.

## Affected products

- Apache Kylin 5.0.0 through 5.0.4

## Timeline

- 2026-10-16: disclosed

## References

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

## Related threats

- [Apache Kylin resource exhaustion in cache API](https://junglewise.ai/threats/cve-2026-108837-allocation-of-resources-without-limits-or-throttling)
- [Apache Kylin default startup profile missing security settings](https://junglewise.ai/threats/cve-2026-108833-default-startup-profile-miss-security-settings-in-apache-kylin)
- [Apache Kylin information disclosure in job manipulation](https://junglewise.ai/threats/cve-2026-108823-exposure-of-sensitive-information-to-an-unauthorized-actor)
- [Apache Kylin JDBC source configuration validation vulnerability](https://junglewise.ai/threats/cve-2026-108780-potential-jdbc-source-configuration-validation-vulnerability-in)
- [Apache Kylin SQL injection in query processing](https://junglewise.ai/threats/cve-2026-108776-improper-neutralization-of-special-elements-used-in-an-sql)