{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "932ce733cde07bb30b1f186303e6692dbb5d087a"
            }
          ],
          "repo": "https://github.com/cfdude/mac-shell-mcp",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108953.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "2.0.0"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "fixed": "2.0.0"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "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.",
  "id": "CVE-2026-108953",
  "modified": "2026-10-15T02:30:59.716479622Z",
  "published": "2026-10-12T12:13:05.422Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108953.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-108953"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/mac-shell-mcp-before-2.0.0-os-command-injection-via-execute-command-arguments"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/cfdude/mac-shell-mcp/issues/45"
    },
    {
      "type": "FIX",
      "url": "https://github.com/cfdude/mac-shell-mcp/commit/932ce733cde07bb30b1f186303e6692dbb5d087a"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/cfdude/mac-shell-mcp"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/cfdude/mac-shell-mcp/blob/1c1708201abb7a18c83075e1bf933e7a92cbeb9f/src/services/command-service.ts#L257-L340"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "mac-shell-mcp before 2.0.0 OS Command Injection via execute_command Arguments"
}