CVE-2026-103265: Fleet before 4.89.0 Information Disclosure via MDM Command Results

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-01 · updated 2026-10-08
Weakness: CWE-863

Description

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.

Affected products

fleetdm fleet: before 4.89.0 — fixed in 4.89.0

How to fix

Upgrade to a fixed version: fleetdm fleet 4.89.0. Check the vendor advisory for mitigations.

References

https://github.com/fleetdm/fleet/security/advisories/GHSA-97fg-h5wh-2399
https://www.vulncheck.com/advisories/fleet-before-4.89.0-information-disclosure-via-mdm-command-results

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