{"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": "2026-06-11T05:03:53.539Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "shortName": "vmware", "dateUpdated": "2026-06-11T05:03:53.539Z"}, "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", "defaultStatus": "unaffected", "versions": [{"status": "affected", "version": "4.0.0", "lessThan": "4.0.7", "versionType": "custom"}, {"status": "affected", "version": "3.5.0", "lessThan": "3.5.15", "versionType": "custom"}, {"status": "affected", "version": "3.4.0", "lessThan": "3.4.17", "versionType": "custom"}]}], "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", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW", "baseScore": 5, "baseSeverity": "MEDIUM"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.1"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-40992", "lastModified": "2026-06-11T07:16:27.177", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "LOW", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 3.4, "source": "security@vmware.com", "type": "Secondary"}]}, "published": "2026-06-11T07:16:27.177", "references": [{"source": "security@vmware.com", "url": "https://spring.io/security/cve-2026-40992"}], "sourceIdentifier": "security@vmware.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "security@vmware.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.0.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.5.0,3.5.15)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.4.0,3.4.17)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Spring Boot", "source": "cna", "vendor": "Spring"}, "product": "spring_boot", "vendor": "spring"}], "created": "2026-06-11T07:30:08.283459+00:00", "updated": "2026-06-11T07:30:08.609349+00:00", "vendors": ["spring", "spring$PRODUCT$spring_boot"]}