{"id":"CVE-2026-56151","state":"PUBLISHED","title":"Improper Input Validation in Kibana Leading to Denial of Service","description":"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.","publishedAt":"2026-07-01T16:29:25.165Z","updatedAt":"2026-07-01T17:25:08.241Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"elastic"},"assigner":"elastic","products":["Elastic Kibana"],"affected":[{"vendor":"Elastic","product":"Kibana","defaultStatus":"unaffected","versions":[{"version":"9.0.0","status":"affected","lessThanOrEqual":"9.3.5","versionType":"semver"},{"version":"8.0.0","status":"affected","lessThanOrEqual":"8.19.16","versionType":"semver"},{"version":"9.4.0","status":"affected","lessThanOrEqual":"9.4.2","versionType":"semver"}]}],"references":["https://discuss.elastic.co/t/kibana-8-19-17-9-3-6-9-4-3-security-update-esa-2026-45"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/56xxx/CVE-2026-56151.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-56151","state":"PUBLISHED","datePublished":"2026-07-01T16:29:25.165Z","dateUpdated":"2026-07-01T17:25:08.241Z","assignerShortName":"elastic","assignerOrgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","dateReserved":"2026-06-19T11:01:02.535Z"},"containers":{"cna":{"title":"Improper Input Validation in Kibana Leading to Denial of Service","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Elastic","product":"Kibana","defaultStatus":"unaffected","versions":[{"version":"9.0.0","status":"affected","lessThanOrEqual":"9.3.5","versionType":"semver"},{"version":"8.0.0","status":"affected","lessThanOrEqual":"8.19.16","versionType":"semver"},{"version":"9.4.0","status":"affected","lessThanOrEqual":"9.4.2","versionType":"semver"}]}],"references":[{"url":"https://discuss.elastic.co/t/kibana-8-19-17-9-3-6-9-4-3-security-update-esa-2026-45"}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseSeverity":"MEDIUM","baseScore":6.5,"confidentialityImpact":"NONE","integrityImpact":"NONE","scope":"UNCHANGED","userInteraction":"NONE","privilegesRequired":"LOW","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"elastic","orgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","dateUpdated":"2026-07-01T16:29:25.165Z"},"impacts":[{"capecId":"CAPEC-153","descriptions":[{"lang":"en","value":"CAPEC-153 Input Data Manipulation"}]}],"source":{"discovery":"Elastic"},"x_generator":{"engine":"Elastic CVE Publisher 0.0.1"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-56151","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-07-01T17:19:03.394968Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-01T17:25:08.241Z"}}]}}}