{"id":"BIT-elk-2026-78581","summary":"Authorization Bypass Through User-Controlled Key in Kibana Leading to Unauthorized Data Modification in Kibana","details":"Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized data modification via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Under certain conditions, an authenticated user could reference another user's AI Assistant conversation identifier to access or modify a conversation they do not own. Successful exploitation requires knowledge of a hard-to-guess identifier.","aliases":["BIT-kibana-2026-78581","CVE-2026-78581"],"modified":"2026-09-08T08:47:08.789647185Z","published":"2026-08-31T05:41:10.306Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:elasticsearch:kibana:*:*:*:*:*:node.js:*:*"]},"references":[{"type":"ADVISORY","url":"https://discuss.elastic.co/t/kibana-8-16-3-8-17-2-security-update-esa-2026-51/387446"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78581"}],"affected":[{"package":{"name":"elk","ecosystem":"Bitnami","purl":"pkg:bitnami/elk"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.0.0"},{"fixed":"8.16.3"},{"introduced":"8.17.0"},{"fixed":"8.17.2"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/elk/BIT-elk-2026-78581.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N"}]}],"schema_version":"1.9.0"}