CVE-2026-103265: Fleet versions before 4.89.0 fail to properly filter MDM command results by team authorization in the commands

Q: How do I fix CVE-2026-103265?

fleet: upgrade to 4.89.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-103265 being exploited?

CVE-2026-103265 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-103265 affect?

CVE-2026-103265 affects fleet. Severity is medium (CVSS 4.3). 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 host

Q: How urgent is CVE-2026-103265?

Priority 18/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADE

CVE-2026-103265 is a medium-severity flaw (CVSS 4.3) affecting fleet. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-10-01
Last modified	2026-10-08

Publisher (CNA): VulnCheck · Vendor: fleetdm

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-01 11:17 UTCPublished CVE record published
2026-10-08 13:17 UTCUpdated Record last modified

fleetdm fleet UPGRADE

Affected: < 4.89.0

Fixed in: 4.89.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy fleet || rpm -q fleet || fleet --version

2. UPGRADE to 4.89.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fleet

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fleet

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-103265?

fleet: upgrade to 4.89.0. Exact commands for each OS are on this page.

Is CVE-2026-103265 being exploited?

CVE-2026-103265 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-103265 affect?

CVE-2026-103265 affects fleet. Severity is medium (CVSS 4.3). 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 host

How urgent is CVE-2026-103265?

Priority 18/100. No elevated risk signals yet.

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References

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