CVE-2026-26191— Fleet vulnerable to OS command injection in software packages
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I. Basic Information for CVE-2026-26191
Vulnerability Information
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Vulnerability Title
Fleet vulnerable to OS command injection in software packages
Source: NVD (National Vulnerability Database)
Vulnerability Description
Fleet is open source device management software. Prior to version 4.81.0, a vulnerability in Fleet's software installer pipeline could allow a crafted software package to execute arbitrary commands as root (macOS/Linux) or SYSTEM (Windows) on managed endpoints when an uninstall is triggered. When a software package (.pkg, .deb, .rpm, .exe, or .msi) is uploaded to Fleet, metadata is extracted from the package binary and used to generate uninstall scripts. In affected versions, this metadata is not properly sanitized before being included in the generated scripts. A specially crafted package containing malicious values in its metadata fields could result in unintended command execution when the uninstall script runs on managed endpoints. Version 4.81.0 contains a patch. If an immediate upgrade is not possible, administrators should avoid uploading software packages obtained from untrusted or unverified sources. Additionally, administrators can manually inspect and edit auto-generated uninstall scripts before deployment.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-26191
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-26191
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- https://github.com/fleetdm/fleet/releases/tag/fleet-v4.81.1x_refsource_MISC
- https://github.com/fleetdm/fleet/security/advisories/GHSA-9vcr-g537-3w5vx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-26191
Same Patch Batch · fleetdm · 2026-05-14 · 6 CVEs total
| CVE-2026-26062 | Fleet server may terminate unexpectedly when handling certain gRPC requests | |
| CVE-2026-24000 | Fleet has a rate limiting bypass via untrusted client IP headers | |
| CVE-2026-24899 | Fleet Windows MDM Azure AD JWT Authentication Bypass | |
| CVE-2026-46356 | Fleet: IP spoofing allows bypassing API rate limiting | |
| CVE-2026-23998 | Fleet has a Windows MDM management endpoint authentication bypass |
IV. Related Vulnerabilities
Same product: fleet
- CVE-2026-46356
Fleet: IP spoofing allows bypassing API rate limiting - CVE-2026-26062
Fleet server may terminate unexpectedly when handling certai - CVE-2026-24899
Fleet Windows MDM Azure AD JWT Authentication Bypass - CVE-2026-24000
Fleet has a rate limiting bypass via untrusted client IP hea - CVE-2026-23998
Fleet has a Windows MDM management endpoint authentication b
Same vendor: fleetdm
- CVE-2026-46356
Fleet: IP spoofing allows bypassing API rate limiting - CVE-2026-26062
Fleet server may terminate unexpectedly when handling certai - CVE-2026-24899
Fleet Windows MDM Azure AD JWT Authentication Bypass - CVE-2026-24000
Fleet has a rate limiting bypass via untrusted client IP hea - CVE-2026-23998
Fleet has a Windows MDM management endpoint authentication b
Same weakness: CWE-78
V. Comments for CVE-2026-26191
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