CVE-2026-0543
Improper Input Validation in Kibana Email Connector Leading to Excessive Allocation
6.5
MEDIUM
CVSS 3.1
EPSS 0.12%
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.
How to fix CVE-2026-0543
To remediate CVE-2026-0543, upgrade the affected package to a fixed version below.
- —upgrade to 8.19.10 or later
- —upgrade to 8.19.10 or later
Is CVE-2026-0543 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 8.19.10, >= 9.0.0, < 9.1.10, >= 9.2.0, < 9.2.4
- from 0, < 8.19.10, >= 9.0.0, < 9.1.10, >= 9.2.0, < 9.2.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |