{"id":"CVE-2026-56151","summary":"Improper Input Validation in Kibana Leading to Denial of Service","details":"Improper Input Validation (CWE-20) in Kibana can lead to a denial of service via Input Data Manipulation (CAPEC-153). An authenticated user can submit a specially crafted Fleet policy input that is not correctly validated, which can render Fleet agent, server, and policy management functionality unavailable.","modified":"2026-07-08T08:12:41.329324246Z","published":"2026-07-01T16:29:25.165Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56151.json","unresolved_ranges":[{"extracted_events":[{"introduced":"9.0.0"},{"last_affected":"9.3.5"},{"introduced":"8.0.0"},{"last_affected":"8.19.16"},{"introduced":"9.4.0"},{"last_affected":"9.4.2"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"elastic","cwe_ids":["CWE-20"]},"references":[{"type":"WEB","url":"https://discuss.elastic.co/t/kibana-8-19-17-9-3-6-9-4-3-security-update-esa-2026-45"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56151.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56151"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/elastic/elasticsearch","events":[{"introduced":"1b6a7ece17463df5ff54a3e1302d825889aa1161"},{"fixed":"402bbb9d596fffa14980c1dd23afca6c7c765908"},{"introduced":"112859b85d50de2a7e63f73c8fc70b99eea24291"},{"fixed":"1f1ab65304a7633cd6511a1fa2b65c914064e724"},{"introduced":"2e8528e92361c3399724226deaf2b46f933e925b"},{"fixed":"45f6a06b1b441b41fe711059b8720013173e7c89"}],"database_specific":{"extracted_events":[{"introduced":"8.0.0"},{"fixed":"8.19.17"},{"introduced":"9.0.0"},{"fixed":"9.3.6"},{"introduced":"9.4.0"},{"fixed":"9.4.3"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*"}}],"versions":["v9.4.2","v9.4.1","v9.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56151.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/elastic/kibana","events":[{"introduced":"57ca5e139a33dd2eed927ce98d8231a1f217cd15"},{"fixed":"a951847dc9bf6f747f1cd9f8445c4fc10ce85d40"},{"introduced":"504d6bfa94cca17fabb76e06152c30c4f0c3efdd"},{"fixed":"23c54dbd59f0a5bf5838a5ef65fadb4a6a4f1220"},{"introduced":"b2e39752e03b56f48f51943214475ddba1f8e974"},{"fixed":"9e9848d35f973e1f40f65d79760037228c54b7ab"}],"database_specific":{"extracted_events":[{"introduced":"8.0.0"},{"fixed":"8.19.17"},{"introduced":"9.0.0"},{"fixed":"9.3.6"},{"introduced":"9.4.0"},{"fixed":"9.4.3"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*"}}],"versions":["v9.4.2","v9.4.1","v9.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56151.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}