# Kibana 8.19.19, 9.3.8, 9.4.4 Security Update (ESA-2026-156)

**URL:** <https://discuss.elastic.co/t/kibana-8-19-19-9-3-8-9-4-4-security-update-esa-2026-156/390111>\
**Category:** Security Announcements\
**Created:** [September 1, 2026, 10:34pm UTC](https://discuss.elastic.co/t/kibana-8-19-19-9-3-8-9-4-4-security-update-esa-2026-156/390111 "2026-09-01T22:34:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Bryan\_Garcia](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bryan_garcia/32/148179_2.png) [@Bryan\_Garcia](https://discuss.elastic.co/u/Bryan_Garcia)\
**Post date:** [September 1, 2026, 10:34pm UTC](https://discuss.elastic.co/t/kibana-8-19-19-9-3-8-9-4-4-security-update-esa-2026-156/390111/1 "2026-09-01T22:34:01Z")

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**Incorrect Authorization in Kibana Leading to Unauthorized Cross-Space Exposure of Machine Learning Job Data**

Incorrect Authorization (CWE-863) in the Kibana machine learning feature can lead to information disclosure via Exploiting Incorrectly Configured Access Control Security Levels (CAPEC-180). An authenticated user holding machine learning job management privileges within a single Kibana space could cause a job's saved object to become accessible across all spaces in the Kibana instance, without holding access rights to those additional spaces.

**Affected Versions:**

- 8.x: All versions from 8.0.0 up to and including 8.19.18
- 9.x:
  - All versions from 9.0.0 up to and including 9.3.7
  - All versions from 9.4.0 up to and including 9.4.3

**Affected Configurations:**

Deployments are affected only when Kibana spaces are in use and one or more non-administrator users have been granted machine learning job management privileges within a space.

**Solutions and Mitigations:**  
The issue is resolved in Kibana versions 8.19.19, 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 ( 5.4 ) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N  
**CVE ID:** CVE-2026-78598  
**Problem Type:** CWE-863 - Incorrect Authorization  
**Impact:** CAPEC-180 - Exploiting Incorrectly Configured Access Control Security Levels