{"id":"CVE-2026-42400","summary":"Uncontrolled Resource Consumption in Kibana Leading to Denial of Service","details":"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 authorization checks, causing excessive memory and CPU resource consumption that can result in a Kibana instance becoming unresponsive or crashing.","aliases":["BIT-elk-2026-42400","BIT-kibana-2026-42400"],"modified":"2026-07-22T00:17:32.017119Z","published":"2026-05-28T19:42:11.414Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"9.4.0"},{"last_affected":"9.4.1"},{"introduced":"9.0.0"},{"last_affected":"9.3.4"},{"introduced":"8.0.0"},{"last_affected":"8.19.15"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"elastic","cwe_ids":["CWE-400"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42400.json"},"references":[{"type":"WEB","url":"https://discuss.elastic.co/t/kibana-8-19-16-9-3-5-9-4-2-security-update-esa-2026-35/386554"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42400.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42400"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/elastic/elasticsearch","events":[{"introduced":"1b6a7ece17463df5ff54a3e1302d825889aa1161"},{"fixed":"0ecfe314ed6ddebb736091bf37b3b6758209b73b"},{"introduced":"112859b85d50de2a7e63f73c8fc70b99eea24291"},{"fixed":"7dcc32bebba091844c0207f9dae8fda6c7d08542"},{"introduced":"2e8528e92361c3399724226deaf2b46f933e925b"},{"fixed":"c402c2b36d90eae29c0182f86bd9050fd0b746cc"}],"database_specific":{"cpe":"cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"8.0.0"},{"fixed":"8.19.16"},{"introduced":"9.0.0"},{"fixed":"9.3.5"},{"introduced":"9.4.0"},{"fixed":"9.4.2"}],"source":"CPE_RANGE"}}],"versions":["v9.4.1","v9.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42400.json","vanir_signatures_modified":"2026-07-22T00:17:32Z","vanir_signatures":[{"signature_version":"v1","source":"https://github.com/elastic/elasticsearch/commit/0ecfe314ed6ddebb736091bf37b3b6758209b73b","target":{"file":"modules/apm/src/test/java/org/elasticsearch/telemetry/apm/RecordingOtelMeter.java"},"deprecated":false,"digest":{"line_hashes":["23074235914325468324376590861514089586","98430579598318027407692933948030043385","187050963769246900287150112416544450660","214623411764654173647043302652335395077","176453353204044914242382593509038157485","213515830173899733296977817562856718047"],"threshold":0.9},"id":"CVE-2026-42400-a85b3975","signature_type":"Line"},{"signature_type":"Line","signature_version":"v1","source":"https://github.com/elastic/elasticsearch/commit/7dcc32bebba091844c0207f9dae8fda6c7d08542","target":{"file":"modules/apm/src/test/java/org/elasticsearch/telemetry/apm/RecordingOtelMeter.java"},"deprecated":false,"digest":{"line_hashes":["23074235914325468324376590861514089586","98430579598318027407692933948030043385","187050963769246900287150112416544450660","214623411764654173647043302652335395077","176453353204044914242382593509038157485","213515830173899733296977817562856718047"],"threshold":0.9},"id":"CVE-2026-42400-d726701b"},{"id":"CVE-2026-42400-edd41f68","signature_type":"Line","signature_version":"v1","source":"https://github.com/elastic/elasticsearch/commit/c402c2b36d90eae29c0182f86bd9050fd0b746cc","target":{"file":"modules/apm/src/test/java/org/elasticsearch/telemetry/apm/RecordingOtelMeter.java"},"deprecated":false,"digest":{"line_hashes":["23074235914325468324376590861514089586","98430579598318027407692933948030043385","187050963769246900287150112416544450660","214623411764654173647043302652335395077","176453353204044914242382593509038157485","213515830173899733296977817562856718047"],"threshold":0.9}}]}},{"ranges":[{"type":"GIT","repo":"https://github.com/elastic/kibana","events":[{"introduced":"57ca5e139a33dd2eed927ce98d8231a1f217cd15"},{"fixed":"209c12d77d1bf1bc561abff2b91aa95f354734a3"},{"introduced":"504d6bfa94cca17fabb76e06152c30c4f0c3efdd"},{"fixed":"db396449a69d0613b0b4dc8b8e9789aa35504e0f"},{"introduced":"b2e39752e03b56f48f51943214475ddba1f8e974"},{"fixed":"ca34dedcfe614964fe236c237a023021da0a8665"}],"database_specific":{"extracted_events":[{"introduced":"8.0.0"},{"fixed":"8.19.16"},{"introduced":"9.0.0"},{"fixed":"9.3.5"},{"introduced":"9.4.0"},{"fixed":"9.4.2"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*"}}],"versions":["v9.4.1","v9.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42400.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"}]}