{"id":"CVE-2026-40992","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-40992","summary":"Spring Boot's Mail Auto-Configuration Does Not Enable SSL Hostname Verification","details":"Spring Boot's Mail auto-configuration does not enable hostname verification. Applications that set the relevant JavaMail property, such as spring.mail.properties.mail.smtp.ssl.checkserveridentity=true, are not affected.\n\nAffected versions:\nSpring Boot 4.0.0 through 4.0.6; 3.5.0 through 3.5.14; 3.4.0 through 3.4.16.","published":"2026-06-11T09:31:55Z","modified":"2026-08-18T20:30:07.401465432Z","cvss":{"score":5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot-starter-mail","fixedVersion":"4.0.7"},{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot-starter-mail","fixedVersion":"3.5.15"},{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot-starter-mail","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40992"},{"type":"PACKAGE","url":"https://github.com/spring-projects/spring-boot"},{"type":"WEB","url":"https://spring.io/security/cve-2026-40992"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T20:30:07.401465432Z"}}