CVE-2026-24899

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{"affected": [{"affectedData": [{"product": "fleet", "vendor": "fleetdm", "versions": [{"status": "affected", "version": "< 4.82.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*", "matchCriteriaId": "C0668117-BE4C-4376-BD0C-1F80F7B47E9E", "versionEndExcluding": "4.82.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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 gesti\u00f3n de dispositivos de c\u00f3digo abierto. Antes de la versi\u00f3n 4.82.0, una vulnerabilidad en el flujo de inscripci\u00f3n MDM de Windows de Fleet permite que los tokens de autenticaci\u00f3n 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 \u2019aud\u2019 (audiencia) o \u2019iss\u2019 (emisor), cualquier token de acceso de Azure AD firmado por Microsoft que contenga los \u00e1mbitos esperados puede ser utilizado para autenticarse en los endpoints MDM de Fleet. Si Windows MDM est\u00e1 habilitado, un atacante con acceso a cualquier inquilino de Azure AD puede obtener un token v\u00e1lido firmado por Microsoft y usarlo para inscribir dispositivos no autorizados e interactuar con las APIs de gesti\u00f3n MDM de Fleet. Durante la gesti\u00f3n de dispositivos, Fleet puede exponer secretos de inscripci\u00f3n sensibles incrustados en las cargas \u00fatiles de comandos MDM, lo que permite un acceso no autorizado adicional. La versi\u00f3n 4.82.0 contiene un parche. Si una actualizaci\u00f3n inmediata no es posible, los usuarios afectados de Fleet deber\u00edan deshabilitar temporalmente Windows MDM."}], "id": "CVE-2026-24899", "lastModified": "2026-10-26T14:10:00.130", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.2, "baseSeverity": "HIGH", "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": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-24899", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-16T00:51:50.857273Z", "version": "2.0.3"}}]}, "published": "2026-05-14T20:17:01.873", "references": [{"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/fleetdm/fleet/releases/tag/fleet-v4.82.0"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-ffg9-j72f-j6xm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-290"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.82.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "fleet", "source": "cna", "vendor": "fleetdm"}, "product": "fleet", "vendor": "fleetdm"}], "created": "2026-05-14T20:30:03.595871+00:00", "updated": "2026-05-14T20:30:04.129333+00:00", "vendors": ["fleetdm", "fleetdm$PRODUCT$fleet"]}