{"id":"CVE-2026-26940","state":"PUBLISHED","title":"Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service","description":"Improper Validation of Specified Quantity in Input (CWE-1284) in the Timelion visualization plugin in Kibana can lead Denial of Service via Excessive Allocation (CAPEC-130). The vulnerability allows an authenticated user to send a specially crafted Timelion expression that overwrites internal series data properties with an excessively large quantity value.","publishedAt":"2026-03-19T17:14:31.734Z","updatedAt":"2026-03-19T17:48:13.985Z","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":"9.3.0","status":"affected","lessThanOrEqual":"9.3.1","versionType":"semver"},{"version":"9.0.0","status":"affected","lessThanOrEqual":"9.2.6","versionType":"semver"},{"version":"8.0.0","status":"affected","lessThanOrEqual":"8.19.12","versionType":"semver"}]}],"references":["https://discuss.elastic.co/t/kibana-8-19-13-9-2-7-9-3-2-security-update-esa-2026-20/385535"],"weaknesses":["CWE-1284"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/26xxx/CVE-2026-26940.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-26940","state":"PUBLISHED","datePublished":"2026-03-19T17:14:31.734Z","dateUpdated":"2026-03-19T17:48:13.985Z","assignerShortName":"elastic","assignerOrgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","dateReserved":"2026-02-16T16:42:05.774Z"},"containers":{"cna":{"title":"Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service","descriptions":[{"lang":"en","value":"Improper Validation of Specified Quantity in Input (CWE-1284) in the Timelion visualization plugin in Kibana can lead Denial of Service via Excessive Allocation (CAPEC-130). The vulnerability allows an authenticated user to send a specially crafted Timelion expression that overwrites internal series data properties with an excessively large quantity value."}],"affected":[{"vendor":"Elastic","product":"Kibana","defaultStatus":"unaffected","versions":[{"version":"9.3.0","status":"affected","lessThanOrEqual":"9.3.1","versionType":"semver"},{"version":"9.0.0","status":"affected","lessThanOrEqual":"9.2.6","versionType":"semver"},{"version":"8.0.0","status":"affected","lessThanOrEqual":"8.19.12","versionType":"semver"}]}],"references":[{"url":"https://discuss.elastic.co/t/kibana-8-19-13-9-2-7-9-3-2-security-update-esa-2026-20/385535"}],"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-1284","description":"CWE-1284 Improper Validation of Specified Quantity in Input","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"elastic","orgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","dateUpdated":"2026-03-19T17:14:31.734Z"},"impacts":[{"capecId":"CAPEC-130","descriptions":[{"lang":"en","value":"CAPEC-130 Excessive Allocation"}]}],"source":{"discovery":"Elastic"},"x_generator":{"engine":"Elastic CVE Publisher 0.0.1"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-19T17:47:56.674224Z","id":"CVE-2026-26940","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-19T17:48:13.985Z"}}]}}}