---
id: CVE-2026-78593
title: >-
  An insufficiently validated configuration field in Kibana's Cribl integration
  allows an authenticated user holding Kibana Fleet management privileges to
  inject attacker-controlled expressions into a server-side script template,
  resulting…
summary: >-
  An insufficiently validated configuration field in Kibana's Cribl integration
  allows an authenticated user holding Kibana Fleet management privileges to
  inject attacker-controlled expressions into a server-side script template,
  resulting…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-94
published: '2026-09-03'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T14:17:41.457'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78593'
references:
  - url: >-
      https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-3-security-update-esa-2026-151/390159
    label: security@elastic.co
tags:
  - nvd
epss: 0.00175
epssPercentile: 0.07286
ingestedAt: '2026-09-08T15:33:26.958Z'
---

## Overview

An insufficiently validated configuration field in Kibana's Cribl integration allows an authenticated user holding Kibana Fleet management privileges to inject attacker-controlled expressions into a server-side script template, resulting in an Elasticsearch ingest pipeline being written beyond the caller's authorized Elasticsearch permissions.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.