FKIE_CVE-2026-18482

Vulnerability from fkie_nvd - Published: 2026-08-20 13:16 - Updated: 2026-08-20 20:17
Severity
Summary
Neo.mjs contains a command injection vulnerability within the FileSystemService.mjs component of the ai/mcp/server/file-system MCP server, where the checkSyntax() and runPlaywrightTest() functions unsafely interpolate caller-controlled absolutePath values into shell commands, enabling arbitrary OS command execution when an AI agent is induced to invoke these tools. Commit 88c77fc fixes these vulnerabilities.
References
cret@cert.orghttps://github.com/neomjs/neo/commit/5acc564ea1b278bca5fab1f8f397a6ba9b849d75
cret@cert.orghttps://github.com/neomjs/neo/commit/88c77fc4
cret@cert.orghttps://novice-22.com/posts/neo-mjs/
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "neo-mjs",
          "vendor": "Klarso GmbH",
          "versions": [
            {
              "lessThan": "88c77fc4",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "cret@cert.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Neo.mjs contains a command injection vulnerability within the FileSystemService.mjs component of the ai/mcp/server/file-system MCP server, where the checkSyntax() and runPlaywrightTest() functions unsafely interpolate caller-controlled absolutePath values into shell commands, enabling arbitrary OS command execution when an AI agent is induced to invoke these tools. Commit 88c77fc fixes these vulnerabilities."
    }
  ],
  "id": "CVE-2026-18482",
  "lastModified": "2026-08-20T20:17:33.800",
  "metrics": {},
  "published": "2026-08-20T13:16:58.560",
  "references": [
    {
      "source": "cret@cert.org",
      "url": "https://github.com/neomjs/neo/commit/5acc564ea1b278bca5fab1f8f397a6ba9b849d75"
    },
    {
      "source": "cret@cert.org",
      "url": "https://github.com/neomjs/neo/commit/88c77fc4"
    },
    {
      "source": "cret@cert.org",
      "url": "https://novice-22.com/posts/neo-mjs/"
    }
  ],
  "sourceIdentifier": "cret@cert.org",
  "vulnStatus": "Received"
}



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Nomenclature

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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