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Fleet DM EUVDEUVD-2026-90659

| CVE-2026-103265 MEDIUM
Incorrect Authorization (CWE-863)
2026-10-01 VulnCheck GHSA-hfhg-8x2p-pvmg
Authentication Bypass Fleet Fleetdm
5.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
4.3 MEDIUM

Network-exploitable by an authenticated low-privileged team-scoped user (PR:L), yielding only limited cross-team read access (C:L) with no integrity or availability impact and no scope change.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
Oct 01, 2026 - 11:36 vuln.today
Patch available
Oct 01, 2026 - 11:01 EUVD

DescriptionCVE.org

Fleet versions before 4.89.0 fail to properly filter MDM command results by team authorization in the commands/results endpoint. Team-scoped users can read MDM command results for hosts on other teams when a shared command UUID targets hosts across multiple teams, exposing host UUIDs, command payloads, and device responses.

AnalysisAI

Team-scoped users in Fleet DM before 4.89.0 can read MDM command results for hosts on other teams via the commands/results endpoint when a shared command UUID targets hosts across multiple teams, exposing host UUIDs, command payloads, and device responses. Exploitation requires an authenticated low-privileged team-scoped account on an instance with MDM features in use, and the disclosure is limited to results tied to such cross-team command UUIDs; there is no public exploit identified at time of analysis. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Vulnerability AssessmentAI

Exploitation Requires an authenticated low-privileged, team-scoped Fleet account (PR:L) on a version before 4.89.0 with MDM features in use. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuine but modest-severity information-disclosure flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to Fleet 4.89.0 or later; the vendor advisory GHSA-97fg-h5wh-2399 (https://github.com/fleetdm/fleet/security/advisories/GHSA-97fg-h5wh-2399) confirms a fix in 4.89.0. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-90659 vulnerability details – vuln.today
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