# Kibana 8.19.20 and 9.4.5 Security Update (ESA-2026-98)

**URL:** <https://discuss.elastic.co/t/kibana-8-19-20-and-9-4-5-security-update-esa-2026-98/389516>\
**Category:** Security Announcements\
**Created:** [August 13, 2026, 10:47am UTC](https://discuss.elastic.co/t/kibana-8-19-20-and-9-4-5-security-update-esa-2026-98/389516 "2026-08-13T10:47:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**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, 10:47am UTC](https://discuss.elastic.co/t/kibana-8-19-20-and-9-4-5-security-update-esa-2026-98/389516/1 "2026-08-13T10:47:55Z")

</div>

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

Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). A specially crafted request submitted by an authenticated user with minimal privileges to a validation capability of the Observability log analysis feature causes Kibana to perform an unbounded amount of concurrent work. This can exhaust the memory available to the Kibana process and make Kibana unavailable to all users until it is restarted. The severity of the outcome depends on the resources allocated to the deployment; on well-provisioned deployments a single request may cause degraded performance and elevated memory pressure rather than a full outage, but the request is inexpensive to repeat.

**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:**

There are no workarounds for this vulnerability.

**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.

**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-2026-72667  
**Problem Type:** CWE-770 - Allocation of Resources Without Limits or Throttling  
**Impact:** CAPEC-130 - Excessive Allocation