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CVE-2026-40992

5.0
MEDIUMCVSS v3.1 Base Score
0.12%
LOW RiskEPSS (2nd percentile)

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.

Published: 6/11/2026
Modified: 6/17/2026
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Vulnerability Summary

CVSS v3 Score

5MEDIUM

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS Score (Exploitation Probability)

0.12%LOW Exploitation Risk
2nd percentile

This vulnerability has a 0.12% probability of being exploited in the next 30 days, ranking higher than 2% of all scored CVEs.

CWE Classification

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