What’s Vulnerable › Vulnerabilities
CVE-2026-26940: Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-19 · updated 2026-06-17
- Weakness: CWE-1284
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.
Affected products
- Kibana: from 8.0.0 before 8.19.13; from 9.0.0 before 9.2.7; from 9.3.0 before 9.3.2 — fixed in 8.19.13, 9.2.7, 9.3.2
How to fix
Upgrade to a fixed version: Kibana 8.19.13, 9.2.7, 9.3.2. Check the vendor advisory for mitigations.
References
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