{"cve":"CVE-2026-40992","nvd":{"published":"2026-06-11T07:16:27.177","modified":"2026-09-04T18:05:38.580","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","score":5.0},"cwes":["CWE-295"],"references":["https://spring.io/security/cve-2026-40992"],"products":["vmware:spring_boot"],"source":"nvd","synced_at":"2026-10-19T22:38:48.522727527+00:00"},"epss":{"cve":"CVE-2026-40992","score":0.00124,"percentile":0.02079,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9wxp-w4px-32vh","url":"https://osv.dev/vulnerability/GHSA-9wxp-w4px-32vh","summary":"Spring Boot's Mail Auto-Configuration Does Not Enable SSL Hostname Verification","modified":"2026-08-18T20:41:04.939461Z","packages":[{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot-starter-mail","purl":"pkg:maven/org.springframework.boot/spring-boot-starter-mail","ranges":[">=4.0.0 <4.0.7"],"fixed":["4.0.7"]},{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot-starter-mail","purl":"pkg:maven/org.springframework.boot/spring-boot-starter-mail","ranges":[">=3.5.0 <3.5.15"],"fixed":["3.5.15"]},{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot-starter-mail","purl":"pkg:maven/org.springframework.boot/spring-boot-starter-mail","ranges":[">=3.4.0 <=3.4.16"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}