CVE-2026-27806: Fleet is open source device management software

Q: How do I fix CVE-2026-27806?

fleet: upgrade to 4.81.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-27806 being exploited?

CVE-2026-27806 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-2026-27806 affect?

CVE-2026-27806 affects fleet. Severity is high (CVSS 7.8). Fleet is open source device management software. Prior to 4.81.1, the Orbit agent's FileVault disk encryption key rotation flow on collects a local user's password via a GUI dialog and interpolates it directly into a Tcl/expect script execu

Routine

HIGH 7.8UPGRADE

CVE-2026-27806 is a high-severity flaw (CVSS 7.8) affecting fleet. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Fleet is open source device management software. Prior to 4.81.1, the Orbit agent's FileVault disk encryption key rotation flow on collects a local user's password via a GUI dialog and interpolates it directly into a Tcl/expect script executed via exec.Command("expect", "-c", script). Because the password is inserted into Tcl brace-quoted send {%s}, a password containing } terminates the literal and injects arbitrary Tcl commands. Since Orbit run

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-04-08
Last modified	2026-07-25

Publisher (CNA): GitHub, Inc. · Vendor: fleetdm

Last updated 2026-07-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 19:25 UTCPublished CVE record published
2026-07-25 11:10 UTCUpdated Record last modified

fleetdm fleet UPGRADE

Affected: < 4.81.1

Fixed in: 4.81.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 4.81.1 (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-2026-27806?

fleet: upgrade to 4.81.1. Exact commands for each OS are on this page.

Is CVE-2026-27806 being exploited?

CVE-2026-27806 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-2026-27806 affect?

CVE-2026-27806 affects fleet. Severity is high (CVSS 7.8). Fleet is open source device management software. Prior to 4.81.1, the Orbit agent's FileVault disk encryption key rotation flow on collects a local user's password via a GUI dialog and interpolates it directly into a Tcl/expect script execu

How urgent is CVE-2026-27806?

Priority 28/100. High severity

Related CVEs

CVE-2026-34387 CRITICAL 9.8 UPGRADE Fleet is open source device management software
CVE-2026-29180 HIGH 8.8 UPGRADE Fleet is open source device management software
CVE-2026-34386 HIGH 8.8 UPGRADE Fleet is open source device management software
CVE-2026-34391 HIGH 7.5 UPGRADE Fleet is open source device management software
CVE-2026-34385 HIGH 8.1 UPGRADE Fleet is open source device management software

References

← Back to latest CVEs