CVE-2026-103264

9.1 CRITICALpublic exploit available

Published 2026-10-01 · Updated 2026-10-01

AI risk analysis

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.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to Fleet version 4.87.0 or later.

auth-bypassfleetmdmiot

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weaknesses

CWE-287

Public exploit & PoC references

https://github.com/fleetdm/fleet/security/advisories/GHSA-vrc8-2wcx-327f

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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