{"id":"CVE-2026-26936","aliases":["BIT-elk-2026-26936","BIT-kibana-2026-26936","EUVD-2026-8866","GHSA-rr4q-h87q-gm3v"],"status":"published","title":"Inefficient Regular Expression Complexity in Kibana Leading to Denial of Service","description":"Inefficient Regular Expression Complexity (CWE-1333) in the AI Inference Anonymization Engine in Kibana can lead Denial of Service via Regular Expression Exponential Blowup (CAPEC-492).","severity":{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00373,"percentile":0.31673,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1333"],"published":"2026-02-26T17:07:40Z","modified":"2026-10-28T10:51:26Z","fixes":[{"ecosystem":"Bitnami","package":"elk","fixed_in":["8.19.11","9.2.5"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"kibana","fixed_in":["8.19.11","9.2.5"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"elk","ranges":[{"type":"SEMVER","events":[{"introduced":"8.0.0"},{"fixed":"8.19.11"},{"introduced":"9.0.0"},{"fixed":"9.2.5"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"kibana","ranges":[{"type":"SEMVER","events":[{"introduced":"8.0.0"},{"fixed":"8.19.11"},{"introduced":"9.0.0"},{"fixed":"9.2.5"}]}]}],"products":[{"vendor":"elastic","product":"kibana"}],"references":[{"url":"https://discuss.elastic.co/t/kibana-8-19-11-9-2-5-security-update-esa-2026-14/385250","tags":["Vendor 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