# Kibana 9.3.1 Security Update (ESA-2026-17)

**URL:** <https://discuss.elastic.co/t/kibana-9-3-1-security-update-esa-2026-17/385253>\
**Category:** Security Announcements\
**Created:** [February 26, 2026, 4:55pm UTC](https://discuss.elastic.co/t/kibana-9-3-1-security-update-esa-2026-17/385253 "2026-02-26T16:55:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ismisepaul](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ismisepaul/32/102235_2.png) [@ismisepaul](https://discuss.elastic.co/u/ismisepaul)\
**Post date:** [February 26, 2026, 4:55pm UTC](https://discuss.elastic.co/t/kibana-9-3-1-security-update-esa-2026-17/385253/1 "2026-02-26T16:55:40Z")

</div>

**Improper Neutralization of Special Elements Used in a Template Engine in Kibana Workflows Leading to Server-Side Request Forgery (SSRF)**

Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336) exists in Workflows in Kibana which could allow an attacker to read arbitrary files from the Kibana server filesystem, and perform Server-Side Request Forgery (SSRF) via Code Injection (CAPEC-242). This requires an authenticated user who has the `workflowsManagement:executeWorkflow` privilege.

**Affected Versions:**

- 9.x: Version 9.3.0

**Affected Configurations:**  
The workflows feature is turned off by default, as its in technical preview in version 9.3.0. The feature needs to be specifically enabled within Advanced Settings.

**Solutions and Mitigations:**

The issue is resolved in version 9.3.1.

**For Users that Cannot Upgrade:**

Disable workflows [https://www.elastic.co/docs/explore-analyze/workflows/setup](https://www.elastic.co/docs/explore-analyze/workflows/setup)

**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: High ( 8.6 ) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N  
**CVE ID** : CVE-2026-26938  
**Problem Type:** CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine  
**Impact:** CAPEC-242 - Code Injection