{"id":"CVE-2026-24899","sourceIdentifier":"security-advisories@github.com","published":"2026-05-14T20:17:01.873","lastModified":"2026-10-26T14:10:00.130","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Fleet is open source device management software. Prior to version 4.82.0, a vulnerability in Fleet's Windows MDM enrollment flow allows authentication tokens from any Azure AD tenant to be accepted. Because Fleet validates JWT signatures using Microsoft's multi-tenant JWKS endpoint but does not enforce the `aud` (audience) or `iss` (issuer) claims, any Microsoft-signed Azure AD access token containing the expected scopes can be used to authenticate to Fleet's MDM endpoints. If Windows MDM is enabled, an attacker with access to any Azure AD tenant can obtain a valid Microsoft-signed token and use it to enroll unauthorized devices and interact with Fleet's MDM management APIs. During device management, Fleet may expose sensitive enrollment secrets embedded in MDM command payloads, enabling further unauthorized access. Version 4.82.0 contains a patch. If an immediate upgrade is not possible, affected Fleet users should temporarily disable Windows MDM."},{"lang":"es","value":"Fleet es un software de gestión de dispositivos de código abierto. Antes de la versión 4.82.0, una vulnerabilidad en el flujo de inscripción MDM de Windows de Fleet permite que los tokens de autenticación de cualquier inquilino de Azure AD sean aceptados. Debido a que Fleet valida las firmas JWT utilizando el endpoint JWKS multi-inquilino de Microsoft pero no aplica las claims ’aud’ (audiencia) o ’iss’ (emisor), cualquier token de acceso de Azure AD firmado por Microsoft que contenga los ámbitos esperados puede ser utilizado para autenticarse en los endpoints MDM de Fleet. Si Windows MDM está habilitado, un atacante con acceso a cualquier inquilino de Azure AD puede obtener un token válido firmado por Microsoft y usarlo para inscribir dispositivos no autorizados e interactuar con las APIs de gestión MDM de Fleet. Durante la gestión de dispositivos, Fleet puede exponer secretos de inscripción sensibles incrustados en las cargas útiles de comandos MDM, lo que permite un acceso no autorizado adicional. La versión 4.82.0 contiene un parche. Si una actualización inmediata no es posible, los usuarios afectados de Fleet deberían deshabilitar temporalmente Windows MDM."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"fleetdm","product":"fleet","versions":[{"version":"< 4.82.0","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/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","baseScore":8.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-05-16T00:51:50.857273Z","id":"CVE-2026-24899","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-290"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*","versionEndExcluding":"4.82.0","matchCriteriaId":"C0668117-BE4C-4376-BD0C-1F80F7B47E9E"}]}]}],"references":[{"url":"https://github.com/fleetdm/fleet/releases/tag/fleet-v4.82.0","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/fleetdm/fleet/security/advisories/GHSA-ffg9-j72f-j6xm","source":"security-advisories@github.com","tags":["Vendor Advisory"]}]}