{"id":"CVE-2026-103264","title":"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","summary":"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 t…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-287"],"vendor":"fleetdm","product":"fleet","affected":["fleet < 4.87.0"],"published":"2026-10-01","updated":"2026-10-01","sourceUpdated":"2026-10-01T11:17:21.410","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103264","references":[{"url":"https://github.com/fleetdm/fleet/security/advisories/GHSA-vrc8-2wcx-327f","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/fleet-before-4.87.0-authentication-bypass-via-device-identifiers","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-01T11:42:53.806Z","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-01T13:30:37.558254Z"},"slug":"CVE-2026-103264","body":"## Overview\n\nFleet 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}