CVE-2026-26940

MEDIUM

Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service

Title source: cna

Description

Improper Validation of Specified Quantity in Input (CWE-1284) in the Timelion visualization plugin in Kibana can lead Denial of Service via Excessive Allocation (CAPEC-130). The vulnerability allows an authenticated user to send a specially crafted Timelion expression that overwrites internal series data properties with an excessively large quantity value.

References (1)

https://discuss.elastic.co/t/kibana-8-19-13-9-2-7-9-3-2-security-update-esa-2026-20/385535

Scores

CVSS v3 6.5

EPSS 0.0006

EPSS Percentile 19.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-1284

Status published

Products (4)

Elastic/Kibana 8.0.0 - 8.19.12

elastic/kibana 8.0.0 - 8.19.13

Elastic/Kibana 9.0.0 - 9.2.6

Elastic/Kibana 9.3.0 - 9.3.1

Published Mar 19, 2026

Tracked Since Mar 19, 2026