CVE-2026-26940 — Improper Validation of Specified Quantity in Input in Kibana

CWE-1284 — Improper Validation of Specified Quantity in Input5 documents5 sources

Severity

6.5MEDIUMNVD

EPSS

0.1%

top 82.58%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Elastic Kibana

Timeline

PublishedMar 19

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages2 packages

▶NVDelastic/kibana8.0.0 — 8.19.13+2

▶CVEListV5elastic/kibana9.3.0 — 9.3.1+2

🔴Vulnerability Details

GHSA

GHSA-xfph-vq69-5ww2: Improper Validation of Specified Quantity in Input (CWE-1284) in the Timelion visualization plugin in Kibana can lead Denial of Service via Excessive↗2026-03-19

▶

CVEList

Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service↗2026-03-19

▶

📋Vendor Advisories

Red Hat

Kibana: Timelion: Kibana Timelion Plugin: Denial of Service via improper input validation in Timelion expressions↗2026-03-19

▶

🕵️Threat Intelligence

Wiz

CVE-2026-26940 Impact, Exploitability, and Mitigation Steps | Wiz↗

▶