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mac-shell-mcp before 2.0.0 OS Command Injection via execute_command Arguments

Type: advisorySource: Official CVE List1 source record

mac-shell-mcp before 2.0.0 contains an OS command injection vulnerability that allows MCP clients to bypass the command whitelist by injecting shell metacharacters into execute_command arguments. Attackers or malicious prompts can call a safe command such as pwd with arguments like ';' to run forbidden commands as the server user without approval.

Announced Source revision 1
Original source ↗

CVE-2026-108953

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-108953

mac-shell-mcp

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "cfdude",
    "product": "mac-shell-mcp",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "2.0.0",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-108953

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#20466 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement