CVE-2026-40992
Mail Auto-Configuration Does Not Enable SSL Hostname Verification
Published: Jun 11, 2026Updated: Jun 11, 2026 Sources: CVE List NVD
5.0CVSS
MEDIUMSpring 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.
EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
CVSS Vector Breakdown
Exploitability
AV:AAttack VectorAdjacent
AC:HAttack ComplexityHigh
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:LConfidentialityLow
I:LIntegrityLow
A:LAvailabilityLow
Weaknesses
Affected Products
Spring Boot
Spring
Attack Graph
Products CVE Techniques Tactics
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Exploitability
No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
MITRE ATT&CK
1 technique Collection
References
Timeline
Published
Jun 11, 2026
Last Updated
Jun 11, 2026
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