CVE-2026-26940 — Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service

CVE-2026-26940

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

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Elastic / Kibana	affected 9.3.0 through 9.3.1; affected 9.0.0 through 9.2.6; affected 8.0.0 through 8.19.12

CWE

CWE-1284

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.