{"id":"CVE-2026-42398","summary":"Server-Side Request Forgery (SSRF) in Kibana Leading to Unauthorized Network Access","details":"Server-Side Request Forgery (CWE-918) in Kibana allows authenticated users with connector management privileges to bypass the operator-configured connection allowlist. By configuring a Webhook connector with a crafted target, an attacker can cause Kibana to issue outbound requests to destinations that the egress restriction controls were intended to block.","aliases":["BIT-elk-2026-42398","BIT-kibana-2026-42398"],"modified":"2026-06-18T04:13:27.812909855Z","published":"2026-05-28T19:47:53.440Z","database_specific":{"cna_assigner":"elastic","cwe_ids":["CWE-918"],"unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"9.3.0"},{"last_affected":"9.3.1"},{"introduced":"9.0.0"},{"last_affected":"9.2.7"}]}],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42398.json"},"references":[{"type":"WEB","url":"https://discuss.elastic.co/t/kibana-9-2-8-and-9-3-2-security-update-esa-2026-37/386557"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42398.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42398"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/elastic/elasticsearch","events":[{"introduced":"112859b85d50de2a7e63f73c8fc70b99eea24291"},{"fixed":"cdb2d7a7a46dfe4ef7c3f859b94fb86ba8e652e1"},{"introduced":"17b451d8979a29e31935fe1eb901310350b30e62"},{"fixed":"43a703737aab6baefa748bc7b69e4054926f2b2c"}],"database_specific":{"cpe":"cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*","source":"CPE_RANGE","extracted_events":[{"introduced":"9.0.0"},{"fixed":"9.2.8"},{"introduced":"9.3.0"},{"fixed":"9.3.2"}]}}],"versions":["v9.3.1","v9.3.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42398.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/elastic/kibana","events":[{"introduced":"504d6bfa94cca17fabb76e06152c30c4f0c3efdd"},{"fixed":"2484ea8af037aecc848b80cdf39f66b62eb7b5a0"},{"introduced":"30ab63cc0017fe2da7a84fb9b285dd762468802d"},{"fixed":"80a75d1ae44e8a67f79adf9709bba3075d85afc7"}],"database_specific":{"cpe":"cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*","source":"CPE_RANGE","extracted_events":[{"introduced":"9.0.0"},{"fixed":"9.2.8"},{"introduced":"9.3.0"},{"fixed":"9.3.2"}]}}],"versions":["v9.3.1","v9.3.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42398.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"}]}