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.
Published: 2026-10-01
Score: 9.3 Critical
EPSS: n/a
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 01 Oct 2026 11:00:00 +0000

Type Values Removed Values Added
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.
Title Fleet before 4.87.0 Authentication Bypass via Device Identifiers
First Time appeared Fleetdm
Fleetdm fleet
Weaknesses CWE-287
CPEs cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*
Vendors & Products Fleetdm
Fleetdm fleet
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-01T13:32:04.417Z

Reserved: 2026-09-30T10:58:33.573Z

Link: CVE-2026-103264

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-01T11:17:21.410

Modified: 2026-10-01T11:17:21.410

Link: CVE-2026-103264

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses