● Low · CVSS 1.7

How to Fix CVE-2026-24004: Missing authorization in fleet

Q: What is the CVSS score for CVE-2026-24004?

1.7 (Low). Vector: `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:U`.

Q: Where is the official advisory for CVE-2026-24004?

The vendor advisory is at [https://github.com/fleetdm/fleet/security/advisories/GHSA-9pm7-6g36-6j78](https://github.com/fleetdm/fleet/security/advisories/GHSA-9pm7-6g36-6j78). The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-24004.

By Sai Kiran Pandrala. Last verified: 2026-05-25.

CVE-2026-24004 is a missing authorization in fleetdm fleet. The fix is to apply the vendor patch noted below.

⚡ At a glance


Severity	1.7 (Low)
Actively exploited?	No public listing in CISA KEV
Affected	fleet < 4.80.1
Fixed in	See vendor advisory
Type (CWE)	CWE-862: Missing Authorization

What is CVE-2026-24004?

Fleet is open source device management software. In versions prior to 4.80.1, a vulnerability in Fleet’s Android MDM Pub/Sub handling could allow unauthenticated requests to trigger device unenrollment events. This may result in unauthorized removal of individual Android devices from Fleet management. If Android MDM is enabled, an attacker could send a crafted request to the Android Pub/Sub endpoint to unenroll a targeted Android device from Fleet without authentication. This issue does not grant access to Fleet, allow execution of commands, or provide visibility into device data. Impact is limited to disruption of Android device management for the affected device. Version 4.80.1 fixes the issue. If an immediate upgrade is not possible, affected Fleet users should temporarily disable Android MDM. The CVSS base score is 1.7 (Low). The official advisory is at https://github.com/fleetdm/fleet/security/advisories/GHSA-9pm7-6g36-6j78.

Am I affected?

Check the version of fleet you are running and compare it against the Affected row above (fleet < 4.80.1). If your build sits inside the affected range, you must patch.

Run the version check that fits your platform:


# Linux package check
dpkg -s fleet 2>/dev/null | grep -i ^Version
rpm -q fleet 2>/dev/null
command -v fleet >/dev/null && fleet --version 2>/dev/null


# Windows (PowerShell)
Get-Package -Name "*fleet*" -ErrorAction SilentlyContinue | Select-Object Name, Version
winget list --name "fleet" 2>$null

How to fix CVE-2026-24004

Upgrade fleet to a patched build: See vendor advisory. The vendor advisory is the source of truth for the exact fixed version.

Ubuntu / Debian


sudo apt-get update
sudo apt-get install --only-upgrade fleet
dpkg -s fleet | grep -i ^Version

RHEL / CentOS / Rocky / AlmaLinux


sudo dnf upgrade --refresh fleet -y
# or for older releases:
sudo yum update fleet -y
rpm -q fleet

SUSE / openSUSE


sudo zypper refresh
sudo zypper update fleet
rpm -q fleet

Node.js / npm


# Update the affected package in your project
npm install fleet@latest
npm ls fleet
npm audit fix

Complete PowerShell remediation script (Windows)


# Fix script for CVE-2026-24004 affecting fleet
# Run as administrator. Detect -> backup -> upgrade -> verify -> log.

$ErrorActionPreference = "Stop"
$LogPath  = "C:\Logs\CVE-2026-24004-fix-$(Get-Date -Format yyyyMMdd-HHmmss).log"
New-Item -ItemType Directory -Force (Split-Path $LogPath) | Out-Null
Start-Transcript -Path $LogPath -Append

try {
    Write-Host "[1/4] Detect installed version"
    $pkg = Get-Package -Name "*fleet*" -ErrorAction SilentlyContinue
    if ($pkg) { $pkg | Format-Table Name, Version }
    else { Write-Host "Not detected via Get-Package; try winget list" }

    Write-Host "[2/4] Backup configuration"
    $backup = "C:\Backup\fleet-$(Get-Date -Format yyyyMMdd)"
    New-Item -ItemType Directory -Force $backup | Out-Null
    Get-ChildItem "C:\ProgramData\fleet" -ErrorAction SilentlyContinue |
        Copy-Item -Destination $backup -Recurse -Force -ErrorAction SilentlyContinue

    Write-Host "[3/4] Apply the upgrade to See vendor advisory"
    winget upgrade --name "fleet" --silent --accept-source-agreements --accept-package-agreements
    if ($LASTEXITCODE -ne 0) {
        # Fallback: pull latest via OS update channel
        Install-Module -Name PSWindowsUpdate -Force -SkipPublisherCheck -ErrorAction SilentlyContinue
        Import-Module PSWindowsUpdate
        Install-WindowsUpdate -MicrosoftUpdate -AcceptAll -IgnoreReboot
    }

    Write-Host "[4/4] Verify the patched build"
    winget list --name "fleet"
    Write-Host "Patch applied. Reboot if prompted."
    exit 0
} catch {
    Write-Error "Patch failed: $_"
    exit 1
} finally {
    Stop-Transcript
}

Complete Bash remediation script (Linux)


#!/usr/bin/env bash
# Fix script for CVE-2026-24004 affecting fleet
# Detect -> backup -> upgrade -> verify -> log.

set -euo pipefail
LOG="/var/log/cve-2026-24004-fix-$(date +%Y%m%d-%H%M%S).log"
exec > >(tee -a "$LOG") 2>&1

echo "[1/4] Detect installed version"
if command -v dpkg >/dev/null; then
    dpkg -s fleet 2>/dev/null | grep -i ^Version || echo "fleet not installed via dpkg"
elif command -v rpm >/dev/null; then
    rpm -q fleet || echo "fleet not installed via rpm"
fi

echo "[2/4] Backup configuration"
BACKUP="/root/backup-cve-2026-24004-$(date +%Y%m%d)"
mkdir -p "$BACKUP"
for d in /etc/fleet /etc/fleet.d /etc/fleet.conf; do
    [ -e "$d" ] && cp -a "$d" "$BACKUP/" || true
done

echo "[3/4] Apply the upgrade (target: See vendor advisory)"
if command -v apt-get >/dev/null; then
    apt-get update
    apt-get install --only-upgrade -y fleet
elif command -v dnf >/dev/null; then
    dnf upgrade --refresh -y fleet
elif command -v yum >/dev/null; then
    yum update -y fleet
elif command -v zypper >/dev/null; then
    zypper --non-interactive update fleet
fi

echo "[4/4] Verify the patched build"
if command -v dpkg >/dev/null; then
    dpkg -s fleet 2>/dev/null | grep -i ^Version
elif command -v rpm >/dev/null; then
    rpm -q fleet
fi
echo "Done. Restart any service that loaded the old library."

If you can't patch immediately

Apply at least one of the following inline controls until you can deploy the patched build. None replace the upgrade.

Restrict exposure with nftables (Linux)


# Allow only trusted CIDR to reach the affected service ports
sudo nft add table inet filter 2>/dev/null || true
sudo nft 'add chain inet filter input { type filter hook input priority 0 ; }' 2>/dev/null || true
sudo nft 'add rule inet filter input tcp dport {80, 443} ip saddr != 10.0.0.0/8 drop'
sudo nft list ruleset

Block at the host firewall (Windows)


New-NetFirewallRule -DisplayName "Block-CVE-2026-24004" -Direction Inbound -Action Block -Protocol TCP -LocalPort 80,443 -RemoteAddress Any -Enabled True
Get-NetFirewallRule -DisplayName "Block-CVE-2026-24004"

Disable the affected service (Linux)


sudo systemctl stop fleet 2>/dev/null || true
sudo systemctl disable fleet 2>/dev/null || true

If the vendor advisory lists an official workaround, prefer that wording verbatim. If no workaround is published, the only safe remediation is the patch.

How to verify the fix worked

After upgrading, confirm the installed version matches the patched build and that no old library is still loaded by a long-running process.


# Linux
dpkg -s fleet 2>/dev/null | grep -i ^Version
rpm -q fleet 2>/dev/null || true
# Pid map check for old library handles
sudo lsof +c0 2>/dev/null | grep -i "DEL.*lib" || true


# Windows
Get-Package -Name "*fleet*" | Select-Object Name, Version
Get-HotFix | Sort-Object InstalledOn -Descending | Select-Object -First 5

Expected: the reported version is at or above See vendor advisory. Restart the affected service (systemctl restart <service> on Linux, or restart the Windows service) so it loads the patched binary.

Frequently asked questions

Other vulnerabilities in the same area that are worth patching alongside this one:

How to Fix CVE-2026-41427: CWE-863: Incorrect Authorization in better-auth — CWE-863: Incorrect Authorization in better-auth
How to Fix CVE-2026-4136: CWE-640 Weak Password Recovery Mechanism for Forgotten Password — CWE-640 Weak Password Recovery Mechanism for Forgotten Password
How to Fix CVE-2026-9245: Open Redirect in Server , Open Redirect in Server
How to Fix CVE-2026-28513: CWE-863: Incorrect Authorization in pocket-id , CWE-863: Incorrect Authorization in pocket-id
How to Fix CVE-2026-39934: Growth Experiments ReassignMenteesJob runs as an infinite loop , Growth Experiments ReassignMenteesJob runs as an infinite loop

Is CVE-2026-24004 actively exploited?

There is no public confirmation of exploitation in the wild listed in CISA KEV at the time of this writing. Patch anyway. Public exploits commonly follow disclosure within weeks.

Do I need to reboot after patching CVE-2026-24004?

For kernel and OS-level updates, yes. For most userland packages a systemctl restart <service> is enough on Linux, and restarting the Windows service or app on Windows. Any process that loaded the old library keeps using it until restarted.

What is the CVSS score for CVE-2026-24004?

1.7 (Low). Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:U.

Where is the official advisory for CVE-2026-24004?

The vendor advisory is at https://github.com/fleetdm/fleet/security/advisories/GHSA-9pm7-6g36-6j78. The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-24004.

References

Official vendor advisory: https://github.com/fleetdm/fleet/security/advisories/GHSA-9pm7-6g36-6j78
NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-24004
CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

*Written by Sai Kiran Pandrala. Assembled from the official vendor advisory, NVD record, and CISA KEV listing on 2026-05-25. Always confirm against the vendor's advisory before applying changes in production.*