# Elasticsearch 8.19.22, 9.4.7, 9.5.4 Security Update (ESA-2026-176)

**URL:** https://discuss.elastic.co/t/elasticsearch-8-19-22-9-4-7-9-5-4-security-update-esa-2026-176/390682
**Category:** Security Announcements
**Created:** [September 25, 2026, 8:33am UTC](https://discuss.elastic.co/t/elasticsearch-8-19-22-9-4-7-9-5-4-security-update-esa-2026-176/390682 "2026-09-25T08:33:33Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![kruskall](https://avatars.discourse-cdn.com/v4/letter/k/ac91a4/32.png) [@kruskall](https://discuss.elastic.co/u/kruskall)
#### Post date: [September 25, 2026, 8:33am UTC](https://discuss.elastic.co/t/elasticsearch-8-19-22-9-4-7-9-5-4-security-update-esa-2026-176/390682/1 "2026-09-25T08:33:33Z")

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**Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service**

Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130).

**Affected Versions:**

- 8.x: All versions from 8.0.0 up to and including 8.19.21
- 9.x:
  - All versions from 9.0.0 up to and including 9.4.7
  - All versions from 9.5.0 up to and including 9.5.3

**Affected Configurations:**  
All configurations where authenticated users have privileges to invoke index analysis APIs.

**Solutions and Mitigations:**

The issue is resolved in version 8.19.22, 9.4.7, 9.5.4.

**For Users that Cannot Upgrade:**

There are no workarounds 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-2026-82300  
**Problem Type:** CWE-400 - Uncontrolled Resource Consumption  
**Impact:** CAPEC-130 - Excessive Allocation