# Kibana 8.19.19, 9.3.8, 9.4.4 Security Update (ESA-2026-71)

**URL:** <https://discuss.elastic.co/t/kibana-8-19-19-9-3-8-9-4-4-security-update-esa-2026-71/388574>\
**Category:** Security Announcements\
**Created:** [July 21, 2026, 10:51pm UTC](https://discuss.elastic.co/t/kibana-8-19-19-9-3-8-9-4-4-security-update-esa-2026-71/388574 "2026-07-21T22:51:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![cronosda](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/cronosda/32/147882_2.png) [@cronosda](https://discuss.elastic.co/u/cronosda)\
**Post date:** [July 21, 2026, 10:51pm UTC](https://discuss.elastic.co/t/kibana-8-19-19-9-3-8-9-4-4-security-update-esa-2026-71/388574/1 "2026-07-21T22:51:22Z")

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

Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated attacker with low-privilege access can trigger a denial of service condition in Kibana by sending a specially crafted, oversized request payload. Processing this user-supplied input requires resource-intensive memory allocation that can exhaust the available heap memory in the Kibana process, causing it to crash and become unavailable to all users.

**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

Users on Kibana 9.5.0 and later are not affected by this vulnerability.

**Affected Configurations:**

- All Kibana deployments are affected. Exploitation requires an authenticated Kibana user with low-privilege access.

**Solutions and Mitigations:**

The issue is resolved in Kibana versions 8.19.19, 9.3.8, and 9.4.4. Users are advised to upgrade to one of these versions or later.

**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-2026-63260  
**Problem Type:** CWE-400 - Uncontrolled Resource Consumption  
**Impact:** CAPEC-130 - Excessive Allocation