# CVE-2026-108837: Apache Kylin resource exhaustion in cache API

Source: https://junglewise.ai/threats/cve-2026-108837-allocation-of-resources-without-limits-or-throttling  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-19. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2026-108837 · Severity: info · Published 2026-10-19

Apache Kylin is a data analytics platform that stores and manages data cubes for fast query execution. A project administrator can exploit a cache API to exhaust computed-column resources, potentially degrading system performance or causing denial of service for other users and analytics workloads.

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

## Quick answers

**Is CVE-2026-108837 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-108837 being exploited in the wild.

**How severe is CVE-2026-108837?** Informational severity, published 19 October 2026.

**Which products and versions are affected?** Apache Kylin 4.0.0 through 5.0.4.

**Is there a fix for CVE-2026-108837?** 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-2026-108837 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-108837?** 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

An allocation of resources without limits or throttling vulnerability exists in the cache API of Apache Kylin versions 4.0.0 through 5.0.4. An attacker with project admin permission can trigger unbounded resource allocation on computed columns, exhausting system resources. The vulnerability requires prior administrative access to a project.

## Affected products

- Apache Kylin 4.0.0 through 5.0.4

## Timeline

- 2026-10-19: disclosed

## References

- [https://lists.apache.org/thread.html/qgpgkx6zh37tlys28qlysrffo6pz614v](https://lists.apache.org/thread.html/qgpgkx6zh37tlys28qlysrffo6pz614v)

## Related threats

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- [Apache Kylin SQL injection in query processing](https://junglewise.ai/threats/cve-2026-108776-improper-neutralization-of-special-elements-used-in-an-sql)
- [Apache Kylin missing authentication and polymorphic deserialization](https://junglewise.ai/threats/cve-2026-108771-missing-authentication-for-in-house-broadcast-and-polymorphic)