# Kibana 8.19.10, 9.1.10, 9.2.4 Security Update (ESA-2026-08)

**URL:** https://discuss.elastic.co/t/kibana-8-19-10-9-1-10-9-2-4-security-update-esa-2026-08/384523
**Category:** Security Announcements
**Created:** [January 13, 2026, 8:47pm UTC](https://discuss.elastic.co/t/kibana-8-19-10-9-1-10-9-2-4-security-update-esa-2026-08/384523 "2026-01-13T20:47:35Z")
**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: [January 13, 2026, 8:47pm UTC](https://discuss.elastic.co/t/kibana-8-19-10-9-1-10-9-2-4-security-update-esa-2026-08/384523/1 "2026-01-13T20:47:35Z")

</div>

**Improper Input Validation in Kibana Email Connector Leading to Excessive Allocation (ESA-2026-08)**

Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially crafted email address parameter. This requires an attacker to have authenticated access with view-level privileges sufficient to execute connector actions. The application attempts to process specially crafted email format, resulting in complete service unavailability for all users until manual restart is performed.

**Affected Versions:**

- 7.x: All versions

- 8.x: All versions from 8.0.0 up to and including 8.19.9

- 9.x:

**Solutions and Mitigations:**

The issue is resolved in version 8.19.10, 9.1.10, 9.2.4.

**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-2026-0543

**Problem Type:** CWE-20 - Improper Input Validation

**Impact:** CAPEC-664 - Excessive Allocation