CVE-2025-27509: Fleetdm Fleet

Critical severity, CVSS 9.3. EPSS: 0.7% chance of exploitation in the next 30 days.

fleetdm/fleet is an open source device management, built on osquery. In vulnerable versions of Fleet, an attacker could craft a specially-formed SAML response to forge authentication assertions, provision a new administrative user account if Just-In-Time (JIT) provisioning is enabled, or create new accounts tied to forged assertions if f MDM enrollment is enabled. This vulnerability is fixed in 4.64.2, 4.63.2, 4.62.4, and 4.58.1.

Affected products

• Fleetdm Fleet: from 4.64.0, before 4.64.2 (fixed in 4.64.2); from 4.63.0, before 4.63.2 (fixed in 4.63.2); from 4.62.0, before 4.62.4 (fixed in 4.62.4); before 4.58.1 (fixed in 4.58.1)

Published 2025-03-06. Last modified 2026-06-17.