# Kibana 9.3.8, 9.4.4 Security Update (ESA-2026-91)

**URL:** <https://discuss.elastic.co/t/kibana-9-3-8-9-4-4-security-update-esa-2026-91/389533>\
**Category:** Security Announcements\
**Created:** [August 13, 2026, 10:48am UTC](https://discuss.elastic.co/t/kibana-9-3-8-9-4-4-security-update-esa-2026-91/389533 "2026-08-13T10:48:50Z")\
**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, 10:48am UTC](https://discuss.elastic.co/t/kibana-9-3-8-9-4-4-security-update-esa-2026-91/389533/1 "2026-08-13T10:48:50Z")

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**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 a denial of service via Excessive Allocation (CAPEC-130). A user-supplied list of document fields accepted by the Kibana Playground for RAG feature was neither bounded in length nor de-duplicated before it was used to assemble the response for each matching document. A single crafted request could therefore make Kibana build a response far larger than the data it was derived from, and the resulting processing and memory pressure exhausts the resources of the Kibana instance.

**Affected Versions:**

> - All versions from 9.3.0 up to and including 9.3.7
> - All versions from 9.4.0 up to and including 9.4.3

**Affected Configurations:**  
All configurations are affected.

**Solutions and Mitigations:**

The issue is resolved in versions 9.3.8 and 9.4.4.

**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-2026-72674  
**Problem Type:** CWE-770 - Allocation of Resources Without Limits or Throttling  
**Impact:** CAPEC-130 - Excessive Allocation