CVE-2026-42401CWE-79cross-site-scripting

CVE-2026-42401

Medium · published May 29, 2026

CVSS v3.1
4.1
EPSS
0%
Percentile
3.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00141 · 3.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-29T00:16Z
Affected products (2)
ProductVersionsFixed in
elastic/kibana≥ 8.0.0, < 8.19.168.19.16
elastic/kibana≥ 9.0.0, < 9.3.59.3.5
References (1)
https://discuss.elastic.co/t/kibana-8-19-16-9-3-5-security-update-esa-2026-34/386552 · [email protected]
EPSS history
Timeline
  • 28 MAY 19:40Z
    Improper Neutralization of Input During Web Page Generation in Kibana Leading to Stored HTML Injection
    cvelistv5