CVE-2026-0543

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.

PUBLISHED Reserved 2025-12-31 | Published 2026-01-13 | Updated 2026-01-13 | Assigner elastic

Problem types

CWE-20 Improper Input Validation

Product status

References

discuss.elastic.co/...2-4-security-update-esa-2026-08/384523

cve.org (CVE-2026-0543)

nvd.nist.gov (CVE-2026-0543)

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