{"id":"CVE-2026-103264","published":"2026-10-01T11:17:21.410","lastModified":"2026-10-01T15:09:04.013","description":"Fleet versions before 4.87.0 contain an authentication bypass vulnerability in the device API that accepts hostnames and hardware serials as authentication tokens in addition to device UUIDs. Unauthenticated attackers who know or guess these non-secret identifiers can authenticate as iOS/iPadOS hosts to read device data and trigger device-scoped actions including software installation and MDM migration.","cvssScore":9.1,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-287"],"vendors":[],"products":[],"references":[{"url":"https://github.com/fleetdm/fleet/security/advisories/GHSA-vrc8-2wcx-327f","tags":[]},{"url":"https://www.vulncheck.com/advisories/fleet-before-4.87.0-authentication-bypass-via-device-identifiers","tags":[]}],"exploitRefs":[{"url":"https://github.com/fleetdm/fleet/security/advisories/GHSA-vrc8-2wcx-327f","tags":[]}],"hasPoc":true,"ai":{"summary":"This vulnerability allows unauthenticated attackers to bypass authentication in Fleet versions before 4.87.0, enabling them to read device data and perform actions such as software installation and MDM migration.","exploitability":"Exploitation is relatively easy for attackers who know or can guess the non-secret identifiers, such as hostnames and hardware serials.","blast_radius":"If exploited, the impact could be significant, as attackers could gain full control over device data and actions.","remediation":"Upgrade to Fleet version 4.87.0 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","fleet","mdm","iot"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-02T08:46:50.214Z"}}