CVE-2026-0543
Medium
Description
Improper Input Validation (CWE-20) in Kibana's Email Connector can allow an attacker to cause an Excessive Allocation (CAPEC-130) through a specially crafted email address parameter. This requires an attacker to have authenticated access with view-level privileges sufficient to execute connector actions. The application attempts to process specially crafted email format, resulting in complete service unavailability for all users until manual restart is performed.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Elastic Kibana
PublishedJan 13, 2026
First seenJan 13, 2026
Weakness typeCWE-20Improper input validation
How to fix
Update
- elastic kibana8.19.0, 9.1.10, 9.2.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| elastic kibana | 7.0.0 ≤ v ≤ 7.17.29, 8.0.0 ≤ v < 8.19.0, 9.0.0 ≤ v < 9.1.10, 9.2.0 ≤ v < 9.2.4 | 8.19.0, 9.1.10, 9.2.4 |
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