{"id":"CVE-2026-42400","title":"Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130)","summary":"Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user can send a specially crafted compressed request payload that is processed prior to authorizat…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400"],"vendor":"elastic","product":"kibana","affected":["kibana >= 8.0.0, < 8.19.16","kibana >= 9.0.0, < 9.3.5","kibana >= 9.4.0, < 9.4.2"],"patched":["kibana 9.4.2"],"published":"2026-05-28","updated":"2026-10-14","sourceUpdated":"2026-10-14T20:10:00.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-42400","references":[{"url":"https://discuss.elastic.co/t/kibana-8-19-16-9-3-5-9-4-2-security-update-esa-2026-35/386554","label":"security@elastic.co"}],"tags":["nvd"],"epss":0.00472,"epssPercentile":0.39246,"ingestedAt":"2026-10-14T20:53:12.345Z","slug":"CVE-2026-42400","body":"## Overview\n\nUncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user can send a specially crafted compressed request payload that is processed prior to authorization checks, causing excessive memory and CPU resource consumption that can result in a Kibana instance becoming unresponsive or crashing.\n\n## Affected\n\n- `kibana >= 8.0.0, < 8.19.16`\n- `kibana >= 9.0.0, < 9.3.5`\n- `kibana >= 9.4.0, < 9.4.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `kibana 9.4.2`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}