{"id":"CVE-2026-40970","aliases":["EUVD-2026-25908","GHSA-c96x-rpm4-349p"],"status":"published","title":"Spring Boot's Elasticsearch auto-configuration doesn't perform hostname verification when connecting to the Elasticsearch server.","description":"When configured to use an SSL bundle, Spring Boot's Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server.\n\nAffected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.","severity":{"version":"3.1","score":5,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00136,"percentile":0.03048,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-295"],"published":"2026-04-27T19:09:58Z","modified":"2026-10-28T02:30:45Z","fixes":[{"ecosystem":"Maven","package":"org.springframework.boot:spring-boot-elasticsearch","fixed_in":["4.0.6"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.springframework.boot:spring-boot-elasticsearch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.0.6"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.springframework.boot:spring-boot-elasticsearch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.0.6"}]}],"versions":["4.0.0","4.0.1","4.0.2","4.0.3","4.0.4","4.0.5"]}],"products":[{"vendor":"spring","product":"spring boot"},{"vendor":"vmware","product":"spring_boot"}],"references":[{"url":"https://spring.io/security/cve-2026-40970","tags":["Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40970","tags":["advisory"]},{"url":"https://github.com/spring-projects/spring-boot/releases/tag/v4.0.6","tags":["web"]},{"url":"https://github.com/advisories/GHSA-c96x-rpm4-349p"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40970.json","tags":["advisory"]},{"url":"https://github.com/spring-projects/spring-boot","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-40970","description":"When configured to use an SSL bundle, Spring Boot's Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server.\n\nAffected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.","status":"published","published":"2026-04-27T19:09:58.835Z","modified":"2026-04-27T19:30:55.167Z","cvss":[{"version":"3.1","score":5,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T13:43:11.445168Z"}],"euvd":[{"id":"EUVD-2026-25908","description":"When configured to use an SSL bundle, Spring Boot's Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server.\n\nAffected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.","status":"published","published":"2026-04-27T19:09:58Z","modified":"2026-04-27T19:30:55Z","cvss":[{"version":"3.1","score":5,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T19:24:17.432529Z"}],"ghsa":[{"id":"GHSA-c96x-rpm4-349p","title":"Spring Boot's Elasticsearch auto-configuration doesn't perform hostname verification when connecting to the Elasticsearch server.","description":"When configured to use an SSL bundle, Spring Boot's Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server.\n\nAffected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.","status":"published","published":"2026-04-27T21:31:02Z","modified":"2026-05-06T18:38:24Z","cvss":[{"version":"3.1","score":5,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:40:01.917039Z"}],"nvd":[{"id":"CVE-2026-40970","description":"When configured to use an SSL bundle, Spring Boot's Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server.\n\nAffected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.","status":"published","published":"2026-04-27T19:16:52.967Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":5,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:12:16.252509Z"}],"osv":[{"id":"CVE-2026-40970","description":"When configured to use an SSL bundle, Spring Boot's Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server.\n\nAffected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.","status":"published","published":"2026-04-27T19:09:58.835Z","modified":"2026-10-28T02:30:45.991168277Z","cvss":[{"version":"3.1","score":5,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:45:03.424067Z"},{"id":"GHSA-c96x-rpm4-349p","title":"Spring Boot's Elasticsearch auto-configuration doesn't perform hostname verification when connecting to the Elasticsearch server.","description":"When configured to use an SSL bundle, Spring Boot's Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server.\n\nAffected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.","status":"published","published":"2026-04-27T21:31:02Z","modified":"2026-05-06T18:56:34.849063Z","cvss":[{"version":"3.1","score":5,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:46:44.927642Z"}]}}