CVE-2026-26940

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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:elastic:kibana::::::::
	cpe:2.3:a:elastic:kibana::::::::
	cpe:2.3:a:elastic:kibana::::::::

History

23 Mar 2026, 13:35

Type	Values Removed	Values Added
CPE		cpe:2.3:a:elastic:kibana::::::::
References	~~() https://discuss.elastic.co/t/kibana-8-19-13-9-2-7-9-3-2-security-update-esa-2026-20/385535 -~~	() https://discuss.elastic.co/t/kibana-8-19-13-9-2-7-9-3-2-security-update-esa-2026-20/385535 - Vendor Advisory
First Time		Elastic Elastic kibana

19 Mar 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-19 18:16

Updated : 2026-03-23 13:35

NVD link : CVE-2026-26940

Mitre link : CVE-2026-26940

CVE.ORG link : CVE-2026-26940

JSON object : View

Products Affected

elastic

kibana

CWE

CWE-1284

Improper Validation of Specified Quantity in Input

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