{"id":"GHSA-c96x-rpm4-349p","summary":"Spring Boot's Elasticsearch auto-configuration doesn't perform hostname verification when connecting to the Elasticsearch server.","details":"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.","aliases":["CVE-2026-40970"],"modified":"2026-05-06T18:56:34.849063Z","published":"2026-04-27T21:31:02Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-05-06T18:38:23Z","nvd_published_at":"2026-04-27T19:16:52Z","cwe_ids":["CWE-295"],"severity":"MODERATE"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40970"},{"type":"PACKAGE","url":"https://github.com/spring-projects/spring-boot"},{"type":"WEB","url":"https://github.com/spring-projects/spring-boot/releases/tag/v4.0.6"},{"type":"WEB","url":"https://spring.io/security/cve-2026-40970"}],"affected":[{"package":{"name":"org.springframework.boot:spring-boot-elasticsearch","ecosystem":"Maven","purl":"pkg:maven/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"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-c96x-rpm4-349p/GHSA-c96x-rpm4-349p.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}