CVE-2026-40992: VMware Spring Boot

Medium severity, CVSS 5.0. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• VMware Spring Boot: from 3.4.0, before 3.4.17 (fixed in 3.4.17); from 3.5.0, before 3.5.14.1 (fixed in 3.5.14.1); from 4.0.0, before 4.0.6.1 (fixed in 4.0.6.1)

Published 2026-06-11. Last modified 2026-09-04.