# Kibana 8.19.15, 9.3.4 Security Update (ESA-2026-49)

**URL:** https://discuss.elastic.co/t/kibana-8-19-15-9-3-4-security-update-esa-2026-49/387444
**Category:** Security Announcements
**Created:** [July 1, 2026, 1:59pm UTC](https://discuss.elastic.co/t/kibana-8-19-15-9-3-4-security-update-esa-2026-49/387444 "2026-07-01T13:59:08Z")
**Posts on this 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: [July 1, 2026, 1:59pm UTC](https://discuss.elastic.co/t/kibana-8-19-15-9-3-4-security-update-esa-2026-49/387444/1 "2026-07-01T13:59:08Z")

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**Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Service**

Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user can submit a specially crafted bulk deletion request that causes excessive resource consumption, which may render Kibana unavailable.

**Affected Versions:**

- 8.x: All versions from 8.0.0 up to and including 8.19.14
- 9.x:
  - All versions from 9.0.0 up to and including 9.3.3
  - (9.4.0 and later not affected)

**Affected Configurations:**

- Affects deployments that use the Timeline feature. Exploitation requires an authenticated account with access to Timeline.

**Solutions and Mitigations:**

The issue is resolved in version 8.19.15, and 9.3.4.

**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 ( 6.5 ) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H  
**CVE ID:** CVE-2026-49087  
**Problem Type:** CWE-770 - Allocation of Resources Without Limits or Throttling  
**Impact:** CAPEC-130 - Excessive Allocation

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_[View the full topic](https://discuss.elastic.co/t/kibana-8-19-15-9-3-4-security-update-esa-2026-49/387444)._