CVE-2026-26940

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

State: Published
Severity: 6.5 Medium
Published: Mar 19, 2026
Updated: Mar 19, 2026
Reserved: Feb 16, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	elastic

Weaknesses

CWE-1284 Improper Validation of Specified Quantity in Input

Affected Products

Product	Versions
KibanaElastic	9.3.0 through 9.3.1Affected 9.0.0 through 9.2.6Affected 8.0.0 through 8.19.12Affected

References

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

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