{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-47838", "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "state": "PUBLISHED", "assignerShortName": "vmware", "dateReserved": "2026-05-20T10:00:51.003Z", "datePublished": "2026-06-09T23:50:07.988Z", "dateUpdated": "2026-06-09T23:50:07.988Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d", "shortName": "vmware", "dateUpdated": "2026-06-09T23:50:07.988Z"}, "title": "Unauthorized User Impersonation when Using X.509 Client Certificates", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-287", "description": "CWE-287: Improper Authentication", "type": "CWE"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "An attacker who can present a carefully crafted X.509 certificate with a malformed CN value can impersonate another user via SubjectDnX509PrincipalExtractor."}]}], "affected": [{"vendor": "Spring", "product": "Spring Security", "defaultStatus": "unaffected", "versions": [{"status": "affected", "version": "5.7.0", "lessThan": "5.7.25", "versionType": "custom"}, {"status": "affected", "version": "5.8.0", "lessThan": "5.8.27", "versionType": "custom"}, {"status": "affected", "version": "6.3.0", "lessThan": "6.3.18", "versionType": "custom"}, {"status": "affected", "version": "6.4.0", "lessThan": "6.4.18", "versionType": "custom"}, {"status": "affected", "version": "6.5.0", "lessThan": "6.5.11", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "SubjectDnX509PrincipalExtractor does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an attacker impersonating another user.\n\nAffected versions:\nSpring Security 5.7.0 through 5.7.24; 5.8.0 through 5.8.26; 6.3.0 through 6.3.17; 6.4.0 through 6.4.17; 6.5.0 through 6.5.10.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "SubjectDnX509PrincipalExtractor does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an attacker impersonating another user.\n\nAffected versions:\nSpring Security 5.7.0 through 5.7.24; 5.8.0 through 5.8.26; 6.3.0 through 6.3.17; 6.4.0 through 6.4.17; 6.5.0 through 6.5.10."}]}], "references": [{"url": "https://spring.io/security/cve-2026-47838"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.1"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "SubjectDnX509PrincipalExtractor does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an attacker impersonating another user.\n\nAffected versions:\nSpring Security 5.7.0 through 5.7.24; 5.8.0 through 5.8.26; 6.3.0 through 6.3.17; 6.4.0 through 6.4.17; 6.5.0 through 6.5.10."}], "id": "CVE-2026-47838", "lastModified": "2026-06-10T00:16:54.897", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.2, "source": "security@vmware.com", "type": "Secondary"}]}, "published": "2026-06-10T00:16:54.897", "references": [{"source": "security@vmware.com", "url": "https://spring.io/security/cve-2026-47838"}], "sourceIdentifier": "security@vmware.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "security@vmware.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.7.0,5.7.25)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.8.0,5.8.27)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.3.0,6.3.18)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.4.0,6.4.18)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.5.0,6.5.11)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Spring Security", "source": "cna", "vendor": "Spring"}, "product": "spring_security", "vendor": "spring"}], "created": "2026-06-10T01:45:18.713630+00:00", "updated": "2026-06-10T02:15:19.172076+00:00", "vendors": ["spring", "spring$PRODUCT$spring_security"]}