CVE-2026-40965

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The vulnerability does not affect RSA key configurations, only deployments using EC keys for JWT signing.\n\nAffected versions:\n- uaa_release: v76.12.0 through v78.12.0 (inclusive); fixed in v78.13.0 or later\n- CF Deployment: v30.0.0 through v56.0.0 (inclusive); fixed in v56.1.0 or later (bundles uaa_release v78.13.0)"}, {"lang": "es", "value": "Las versiones de Cloud Foundry UAA v76.12.0 hasta v78.12.0 son vulnerables a una exposici\u00f3n de clave privada. El servidor contiene una vulnerabilidad donde las claves privadas EC (Curva El\u00edptica) se exponen inadvertidamente a trav\u00e9s del endpoint p\u00fablico /token_keys. Este endpoint est\u00e1 dise\u00f1ado para proporcionar material de clave p\u00fablica para la verificaci\u00f3n de tokens JWT, pero expone incorrectamente componentes de clave privada para claves EC. La vulnerabilidad afecta a los despliegues que utilizan claves EC para la firma de tokens JWT. La vulnerabilidad no afecta las configuraciones de clave RSA, solo los despliegues que utilizan claves EC para la firma de tokens JWT.\n\nVersiones afectadas:\n- uaa_release: v76.12.0 hasta v78.12.0 (inclusive); corregido en v78.13.0 o posterior\n- CF Deployment: v30.0.0 hasta v56.0.0 (inclusive); corregido en v56.1.0 o posterior (incluye uaa_release v78.13.0)"}], "id": "CVE-2026-40965", "lastModified": "2026-07-22T18:10:00.117", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 6.0, "source": "security@vmware.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security@vmware.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40965", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-02T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-06-01T22:16:25.600", "references": [{"source": "security@vmware.com", "url": "https://www.cloudfoundry.org/blog/cve-2026-40965-uaa-ec-private-key-disclosure/"}], "sourceIdentifier": "security@vmware.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "security@vmware.com", "type": "Secondary"}]}

{}

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