Vulnerability DatabaseCVE-2026-40992
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CVE-2026-40992
Published:June 11, 2026
Updated:June 28, 2026
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
https://github.com/spring-projects/spring-boot.git (GITHUB):
Affected version(s) >=v3.5.0 <v3.5.15
Fix Suggestion:
Update to version v3.5.15
https://github.com/spring-projects/spring-boot.git (GITHUB):
Affected version(s) >=v4.0.0 <v4.0.7
Fix Suggestion:
Update to version v4.0.7
Related Resources (1)
https://spring.io/security/cve-2026-40992
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CVSS v4
Base Score:
2.3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Weakness Type (CWE)
Improper Certificate Validation
CWE-295
EPSS
Base Score:
0.12