What’s Vulnerable › Vulnerabilities
CVE-2026-26934: 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: 2026-02-26 · updated 2026-06-17
- Weakness: CWE-1284
Description
Improper Validation of Specified Quantity in Input (CWE-1284) in Kibana can allow an authenticated attacker with view-only privileges to cause a Denial of Service via Input Data Manipulation (CAPEC-153). An attacker can send a specially crafted, malformed payload causing excessive resource consumption and resulting in Kibana becoming unresponsive or crashing.
Affected products
- Kibana: from 8.18.0 before 8.19.12; from 9.0.0 before 9.2.6; 9.3.0 — fixed in 8.19.12, 9.2.6
How to fix
Upgrade to a fixed version: Kibana 8.19.12, 9.2.6. Check the vendor advisory for mitigations.
References
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