CVE-2026-40992

Summary

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 Software

VendorProductVersion RangeStatus
SpringSpring Boot4.0.0 < 4.0.6.1affected
SpringSpring Boot3.5.0 < 3.5.14.1affected
SpringSpring Boot3.4.0 < 3.4.17affected

Weaknesses

  • CWE-295: CWE-295: Improper Certificate Validation

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References