medium5.0
CVE-2026-40992
Spring Boot's Mail Auto-Configuration Does Not Enable SSL Hostname Verification
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.springframework.boot:spring-boot-starter-mail | >= 4.0.0, <= 4.0.6 | 4.0.7 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Vmware | Spring Boot | from 3.4.0 before 3.4.17 from 3.5.0 before 3.5.14.1 from 4.0.0 before 4.0.6.1 |