{"id":"BIT-elk-2026-0543","summary":"Improper Input Validation in Kibana Email Connector Leading to Excessive Allocation","details":"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.","aliases":["BIT-kibana-2026-0543","CVE-2026-0543"],"modified":"2026-09-08T08:47:19.223263455Z","published":"2026-01-16T08:39:07.127Z","database_specific":{"cpes":["cpe:2.3:a:elasticsearch:kibana:*:*:*:*:*:node.js:*:*"],"severity":"Medium"},"references":[{"type":"ADVISORY","url":"https://discuss.elastic.co/t/kibana-8-19-10-9-1-10-9-2-4-security-update-esa-2026-08/384523"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0543"}],"affected":[{"package":{"name":"elk","ecosystem":"Bitnami","purl":"pkg:bitnami/elk"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.19.10"},{"introduced":"9.0.0"},{"fixed":"9.1.10"},{"introduced":"9.2.0"},{"fixed":"9.2.4"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/elk/BIT-elk-2026-0543.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}],"schema_version":"1.9.0"}