Denial of Service Vulnerability in Timelion Visualization Plugin for Kibana by Elastic
CVE-2026-26940

6.5MEDIUM

Key Information:

Vendor

Elastic
Status
Kibana
Vendor
CVE Published:
19 March 2026

What is CVE-2026-26940?

The Timelion visualization plugin in Kibana is affected by an improper validation issue that allows authenticated users to send crafted Timelion expressions. These expressions can overwrite internal series data properties with excessively large quantity values, potentially leading to Denial of Service through excessive allocation of resources.

Affected Version(s)

Kibana 9.3.0 <= 9.3.1

Kibana 9.0.0 <= 9.2.6

Kibana 8.0.0 <= 8.19.12

References

https://discuss.elastic.co/t/kibana-8-19-13-9-2-7-9-3-2-s...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.