{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-40992","assignerOrgId":"dcf2e128-44bd-42ed-91e8-88f912c1401d","state":"PUBLISHED","assignerShortName":"vmware","dateReserved":"2026-04-16T02:19:09.389Z","datePublished":"2026-06-11T05:03:53.539Z","dateUpdated":"2026-06-23T19:46:36.493Z"},"containers":{"cna":{"providerMetadata":{"orgId":"dcf2e128-44bd-42ed-91e8-88f912c1401d","shortName":"vmware","dateUpdated":"2026-06-23T19:46:36.493Z"},"title":"Mail Auto-Configuration Does Not Enable SSL Hostname Verification","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-295","description":"CWE-295: Improper Certificate Validation","type":"CWE"}]}],"impacts":[{"descriptions":[{"lang":"en","value":"A network attacker in a man-in-the-middle position on the mail submission path can intercept or tamper with mail traffic because Spring Boot Mail auto-configuration does not enable SSL hostname verification."}]}],"affected":[{"vendor":"Spring","product":"Spring Boot","versions":[{"status":"affected","version":"4.0.0","lessThan":"4.0.6.1","versionType":"custom"},{"status":"affected","version":"3.5.0","lessThan":"3.5.14.1","versionType":"custom"},{"status":"affected","version":"3.4.0","lessThan":"3.4.17","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"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.\n\nAffected versions:\nSpring Boot 4.0.0 through 4.0.6; 3.5.0 through 3.5.14; 3.4.0 through 3.4.16.","supportingMedia":[{"type":"text/html","base64":false,"value":"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.\n\nAffected versions:\nSpring Boot 4.0.0 through 4.0.6; 3.5.0 through 3.5.14; 3.4.0 through 3.4.16."}]}],"references":[{"url":"https://spring.io/security/cve-2026-40992"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"ADJACENT_NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"LOW","baseSeverity":"MEDIUM","baseScore":5,"vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"}}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.1"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-11T12:45:53.521120Z","id":"CVE-2026-40992","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-11T12:45:59.834Z"}}]}}