Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-0543

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
13/01/2026
Last modified:
22/01/2026

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
6.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:* 7.0.0 (including) 7.17.29 (including)
cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:* 8.0.0 (including) 8.19.0 (excluding)
cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:* 9.0.0 (including) 9.1.10 (excluding)
cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:* 9.2.0 (including) 9.2.4 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools