# Kibana 8.19.20, 9.4.5 Security Update (ESA-2026-100)

**URL:** <https://discuss.elastic.co/t/kibana-8-19-20-9-4-5-security-update-esa-2026-100/389519>\
**Category:** Security Announcements\
**Created:** [August 13, 2026, 10:48am UTC](https://discuss.elastic.co/t/kibana-8-19-20-9-4-5-security-update-esa-2026-100/389519 "2026-08-13T10:48:05Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![ikakavas](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ikakavas/32/34430_2.png) [@ikakavas](https://discuss.elastic.co/u/ikakavas)\
**Post date:** [August 13, 2026, 10:48am UTC](https://discuss.elastic.co/t/kibana-8-19-20-9-4-5-security-update-esa-2026-100/389519/1 "2026-08-13T10:48:05Z")

</div>

**Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Service**

**Description:**  
Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). A specially crafted, malformed payload submitted to a Kibana visualization feature by an authenticated user holding only low-privileged access is not correctly validated before use. Processing the request causes unbounded memory growth in the Kibana process, which is terminated by the host once available memory is exhausted. Kibana then becomes unavailable to all users until the service is restarted.

**Affected Versions:**

> 

> - All versions from 8.0.0 up to and including 8.19.19
> - All versions from 9.0.0 up to and including 9.4.4

**Affected Configurations:**  
All configurations are affected

**Solutions and Mitigations:**

The issue is resolved in versions 8.19.20 and 9.4.5.

**For Users that Cannot Upgrade:**

**Self-Managed**  
Disable the Timelion visualization type by adding the following setting to kibana.yml and restarting Kibana:

> vis\_type\_timelion.enabled: false  
> Note that this removes the ability to create, edit, or render existing Timelion visualizations.

**Cloud**  
For Elastic Cloud Hosted deployments, apply the same setting through the Kibana user settings override in the deployment edit view, then save to roll out the change.

> vis\_type\_timelion.enabled: false

**Indicators of Compromise (IOC)**  
No specific indicators of compromise have been identified for this vulnerability.

**Elastic Cloud Serverless**  
Due to our continuous deployment and patching model, the vulnerability described in this security advisory was remediated in our Elastic Cloud Serverless offering before the public disclosure. The affected visualization type is additionally not available in Elastic Cloud Serverless.

**Severity:** CVSSv3.1: Medium ( 6.5 ) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H  
**CVE ID:** CVE-2026-72659  
**Problem Type:** CWE-770 - Allocation of Resources Without Limits or Throttling  
**Impact:** CAPEC-130 - Excessive Allocation