Improper Neutralization of Input During Web Page Generation in Kibana Leading to Stored HTML Injection
Improper Neutralization of Input During Web Page Generation (CWE-79) in Kibana can lead to stored HTML injection. A user with write access to an Elasticsearch index could persist crafted markup which, when subsequently rendered through an affected Kibana view by another user, was not sufficiently sanitized. Successful exploitation could result in unauthorized UI manipulation and outbound network requests issued from the viewing user's browser session.
Affected Versions:
- 8.x: All versions from 8.0.0 up to and including 8.19.15
- 9.x: All versions from 9.0.0 up to and including 9.3.4
Affected Configurations:
- This is a self-hosted plugin, so no cloud deployment is affected.
Solutions and Mitigations:
The issue is resolved in Kibana versions 8.19.16, 9.3.5.
Severity: CVSSv3.1: Medium ( 4.1 ) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
CVE ID: CVE-2026-42401
Problem Type: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')