Auth bypass in Fleetdm Fleet
CVE-2026-103265
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.
Vulnerability class: Broken Access Control
Published .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/fleetdm/fleet/security/advisories/GHSA-97fg-h5wh-2399 (vendor-advisory)
- www.vulncheck.com/advisories/fleet-before-4.89.0-information-disclosure-via-mdm… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103265?
- CVE-2026-103265 is a medium-severity vulnerability in Fleetdm Fleet, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-10-01.
- How severe is CVE-2026-103265?
- Medium severity. CVSS v3 base score is 4.3 out of 10.