PT-2026-48616 · Spring · Spring Boot

Published 2026-06-11 · Updated 2026-06-11 · CVE-2026-40992

NVD

CVSS v3.1

5.0

Medium

Base vector

AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

Fix

Improper Certificate Validation

Weakness Enumeration

CWE-295

Related Identifiers

CVE-2026-40992

Affected Products

Spring Boot

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-40992 · Security Note
• https://spring.io/security/cve-2026-40992 · Note