---
title: "CVE-2026-108953: mac-shell-mcp - Command Injection"
description: "mac-shell-mcp < 2.0.0 contains a command injection caused by injection of shell metacharacters into execute_command arguments, letting attackers bypass command whitelist and execute arbitrary OS commands as server user, exploit requires attacker to send crafted execute_command arguments."
url: https://panop.io/threat-heartbeat/CVE-2026-108953/
---

# CVE-2026-108953 mac-shell-mcp - Command Injection

mac-shell-mcp < 2.0.0 contains a command injection caused by injection of shell metacharacters into execute\_command arguments, letting attackers bypass command whitelist and execute arbitrary OS commands as server user, exploit requires attacker to send crafted execute\_command arguments.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.75% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-108953)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

12 October 2026

Updated

15 October 2026

Weakness

[CWE-78](https://cwe.mitre.org/data/definitions/78.html)

## Vendor fix

Update to version 2.0.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-108953](https://nvd.nist.gov/vuln/detail/CVE-2026-108953)
- [https://github.com/cfdude/mac-shell-mcp](https://github.com/cfdude/mac-shell-mcp)
- [https://github.com/cfdude/mac-shell-mcp/blob/1c1708201abb7a18c83075e1bf933e7a92cbeb9f/src/services/command-service.ts#L257-L340](https://github.com/cfdude/mac-shell-mcp/blob/1c1708201abb7a18c83075e1bf933e7a92cbeb9f/src/services/command-service.ts#L257-L340)
- [https://github.com/cfdude/mac-shell-mcp/commit/932ce733cde07bb30b1f186303e6692dbb5d087a](https://github.com/cfdude/mac-shell-mcp/commit/932ce733cde07bb30b1f186303e6692dbb5d087a)
- [https://github.com/cfdude/mac-shell-mcp/issues/45](https://github.com/cfdude/mac-shell-mcp/issues/45)
- [https://www.vulncheck.com/advisories/mac-shell-mcp-before-2.0.0-os-command-injection-via-execute-command-arguments](https://www.vulncheck.com/advisories/mac-shell-mcp-before-2.0.0-os-command-injection-via-execute-command-arguments)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)