{"id":"EUVD-2026-30374","revision":"30b520e6b1a84f2688e9b68aa2408ba6","records":[{"revision":"30b520e6b1a84f2688e9b68aa2408ba6","observedAt":"2026-10-28T02:08:05.917+00:00","statement":{"source":"euvd","id":"EUVD-2026-30374","aliases":["CVE-2026-24899","GHSA-ffg9-j72f-j6xm"],"title":"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 us…","description":"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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"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","score":8.2,"severity":null}],"references":["https://github.com/fleetdm/fleet/security/advisories/GHSA-ffg9-j72f-j6xm","https://github.com/fleetdm/fleet/releases/tag/fleet-v4.82.0"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30374","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 14, 2026, 6:58:26 PM","dateUpdated":"May 16, 2026, 12:52:04 AM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-30374","identifiers":["EUVD-2026-30374","CVE-2026-24899","GHSA-ffg9-j72f-j6xm"]},"retained":false,"historicalAffected":[]}],"coverage":[]}