CVE-2026-40992

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. Affected versions: Spring Boot 4.0.0 through 4.0.6; 3.5.0 through 3.5.14; 3.4.0 through 3.4.16.

Score

CVSS 3.1 5.0 Medium

Status

Analyzed - security@vmware.com

Published

2026-06-11

Last modified

2026-06-23

Weaknesses

CWE-295

Affected products

• Spring Boot (Spring)
• Spring Boot (Vmware)

References

• https://spring.io/security/cve-2026-40992